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Magnetization control of the critical current in a S-(S/F)-S superconducting switch Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-19 Lukas Kammermeier, Elke Scheer
We show the control of the critical current Ic of a superconductor–superconductor/ferromagnet–superconductor [S-(S/F)-S] type switch by the magnetization state of the F. The inverse proximity effect of a S/F bilayer is used to define the weak link and hence the maximum critical current of the junction. The magnetization of the F lead is set by an external magnetic field. We show that the critical current
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Enhanced surrounding sound signal acquisition for arbitrary source location by the acoustic higher-order topological insulator Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-18 Minhang Ling, Zitong Xu, Shuxia Wang, Yingzhou Huang, Li Wang
Topological acoustics is a rapidly developing field due to its fascinating topological properties in artificial metamaterials. However, the topological crystals are generally composed of coupled waveguides or resonant cavities, which often leads to fixed excitation positions and excessive structure size, so making them difficult to fabricate and apply in real life. In this work, we proposed an ingenious
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Properties of photocurrent and metal contacts of highly resistive ultrawide bandgap semiconductors Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-18 A. Tingsuwatit, N. K. Hossain, Z. Alemoush, M. Almohammad, J. Li, J. Y. Lin, H. X. Jiang
Ultrawide bandgap (UWBG) semiconductors inherently exhibit very high electrical resistivities. This property presents not only challenges in probing their electrical transport properties but also difficulties to fabricate, understand, and characterize the electrical properties of metal contacts on these materials. Here, we report the measurements and analysis of the applied electric field dependence
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Possible existence of chiral spin textures in the Bi2Sr2CaCu2O8+δ /Fe1− xTbx heterostructure Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-18 Yiqing Dong, Qirui Cui, Menghan Liao, Hengan Zhou, Teng Xu, Jiabin Qiao, Zhiting Gao, Mengqi Zhao, Rajesh V. Chopdekar, Ding Zhang, Hongxin Yang, Wanjun Jiang
Toward low-energy-consumption spintronic devices, magnetic multilayers that host chiral spin textures, as well as efficient spin-torques, are highly promising. As compared with resistive materials, superconducting materials are optimal for constructing dissipationless electronic devices, in which the electricity is conducted without producing Joule heating. In this regard, magnetic multilayers containing
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Multi-harmonic phononic frequency comb generation in capacitive CMOS-MEMS resonators Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-18 Kalyani S. Bhosale, Sheng-Shian Li
Phononic frequency combs (PFCs) have emerged as a pivotal technology in precision measurements and advanced signal processing, harnessing the power of discrete, evenly spaced frequency lines. Their expansion into the realm of microelectromechanical systems (MEMS) presents potential opportunities for enhanced control in various applications, from telecommunications to quantum computing. This work presents
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Quantitative microwave-induced thermoacoustic microscopy Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-18 Yi Chen, Zihui Chi, Shuang Du, Qiuchao Fang, Huabei Jiang
Visualization and analysis of microstructure of materials or tissue play a pivotal role in industrial manufacturing and pathological diagnosis. Microwave-induced thermoacoustic microscopy (TAM) enables imaging at the microscopic level. TAM, however, is currently qualitative and cannot quantitatively measure intrinsic electromagnetic parameters of materials/tissue, such as conductivity. Here, we propose
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Solar-blind ultraviolet emission-detection monolithic integration of AlGaN multiple-quantum-well diodes via concentric ring-circle configuration Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-18 Yuxuan Chen, Ke Jiang, Bingxiang Wang, Kexi Liu, Xianjun Wang, Jianwei Ben, Shanli Zhang, Shunpeng Lu, Yang Chen, Yuping Jia, Mingrui Liu, Xiaojuan Sun, Dabing Li
AlGaN multiple-quantum-well diode-based solar-blind ultraviolet emission-detection monolithic integration system shows great application value due to its advantages of multifunctionality, secure communication, and anti-interference ability. To reduce the lateral optical propagation loss and improve the emitting light detection efficiency, we have proposed a concentric ring-circle configuration for
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Strain-induced multi-band spin-wave logic gate based on alligator-type magnonic crystal/PZT structure Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-18 A. A. Grachev, S. E. Sheshukova, A. V. Sadovnikov
Here, we report the results of strain-controlled spin-wave propagation regimes in a double-period multiferroic structure. It consists of an alligator-type magnonic crystal with a period of 250 μm and a piezoelectric layer, featuring a periodic counter-pin-type electrode system with a period of 125 μm. Employing microwave measurements, we acquired the transmission and dispersion of spin waves under
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Brownian particles in a soft matter potential: A model for directional drug transport and release in polymer network Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-18 Yu Lu, Guo-Hui Hu
Improvement of efficiency in drug release is of profound importance in biomedical engineering. The drift and diffusion of Brownian particles in a flexible and porous medium is a typical model for describing the directional drug release system. The tilted periodic potential, usually referred to as the washboard potential (WBP), is a well-known model for describing the motion of Brownian particles in
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Substrate-independent thermal conductance of Al/graphene/dielectric interfaces from 80 to 300 K Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-18 Weidong Zheng, Cheng Shao, Chunwei Zhang, Weijia Guo, Hongkun Li
Despite the importance of physical understanding of interfacial thermal conductance (G) for metal/graphene (Gr)/dielectric interfaces, there exists a large discrepancy regarding the role of dielectric substrates in thermal transport across graphene interfaces in previous studies. In this work, we experimentally investigate the impact of dielectric substrates on thermal transport across metal/Gr/dielectric
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Onset of tetrahedral interstitial formation in GaAsN alloys Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 J. J. P. Cooper, T. Jen, A. Novak, Z. Xi, L. Qi, F. U. Naab, Y. Q. Wang, R. S. Goldman
N incorporation mechanisms in GaAs1−xNx alloys are probed using combined experimental and computational Rutherford backscattering spectrometry and nuclear reaction analysis angular yield scans. For xN < 0.025, in addition to substitutional nitrogen, NAs, (N-N)As, and (N-As)As split-interstitials are observed. However, for xN ≥ 0.025, evidence for N tetrahedral interstitials, Ntetra, emerges. We propose
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Unraveling of the Lindblad equation of N coupled oscillators into N independent ones Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 J. Moreno, A. Pendse, A. Eisfeld
We consider a system of N bi-linearly coupled damped harmonic quantum oscillators with time-evolution governed by a Lindblad equation. We show that the corresponding stochastic quantum state diffusion equation can be transformed into a set of N independent damped harmonic oscillators. This offers a great reduction in the basis size. We investigate the numerical performance of the method and find, in
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Resonant plasmonic terahertz photomixing using interdigital graphene micro-nanoribbon arrays Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 V. Ryzhii, M. Ryzhii, C. Tang, T. Otsuji, M. S. Shur
We analyze the generation of the terahertz (THz) radiation in photomixers using the interdigital graphene micro-nanoribbon (GMNR) array excited by modulated light or ultrashort radiation pulses. Replacing the standard metal electrodes by the GMNR array enables in the twofold advantages: an increase in the carrier generation efficiency due to the GMNR optical transparence and the possibility of the
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Particle levitation tensiometry (PLT) for probing interfaces of liquid–liquid phase separation systems (LLPSs) Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Diwen Wu, Siquan Wang, Lei Li, Si Meng, Cheng Qi, Tiantian Kong, Zhou Liu
We introduce a particle levitation tensiometry to accurately quantify ultra-low interfacial tensions in liquid–liquid phase separation (LLPS) systems, crucial for understanding the structure and dynamics of membrane-less organelles in biological cells. Our technique uses non-reactive spherical microparticles to balance gravitational and interfacial forces, providing precise, repeatable, and reliable
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Electric field-induced nonreciprocal spin current due to chiral phonons in chiral-structure superconductors Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Dapeng Yao, Mamoru Matsuo, Takehito Yokoyama
A recent experiment [Nakajima, et al., Nature 613, 479 (2023)] has reported a pair of oppositely polarized spins under an alternating electric current in a superconductor with a chiral structure. However, these behaviors cannot be explained by the conventional Edelstein effect and require a new mechanism. In this Letter, we propose a mechanism of spin current generation under an external electric field
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Improving AlGaN-based deep-ultraviolet light-emitting diodes: SiO2 passivation and size optimization for enhanced optoelectronic performance Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Zesen Liu, Jianhong Zhang, Jiandong Ye, Yating Shi, Jie Fu, Yiwang Wang, Weizong Xu, Dong Zhou, Feng Zhou, Rong Zhang, Hai Lu, Fang-Fang Ren
The authors investigate 275-nm AlGaN-based deep-ultraviolet (DUV) light-emitting diodes (LEDs) of varied dimensions (100, 150, 200, and 300 μm) with or without SiO2 passivation. The results indicate SiO2 passivation significantly enhances the emission intensity and external quantum efficiency in smaller LEDs (100 μm) by mitigating sidewall defects and non-radiative recombination. Conversely, SiO2 passivation
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Optically pumped stimulated emission in HgCdTe-based quantum wells: Toward continuous wave lasing in very long-wavelength infrared range Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 V. V. Rumyantsev, K. A. Mazhukina, V. V. Utochkin, K. E. Kudryavtsev, A. A. Dubinov, V. Ya. Aleshkin, A. A. Razova, D. I. Kuritsin, M. A. Fadeev, A. V. Antonov, N. N. Mikhailov, S. A. Dvoretsky, V. I. Gavrilenko, F. Teppe, S. V. Morozov
Amplified interband emission within the 14–24 μm range is investigated in HgCdTe-based quantum wells under optical pumping. Carrier lifetimes are shown to be marginally limited only by Shockley–Read–Hall recombination, fully realizing the advantage of relativistic energy spectra of 2D HgCdTe in terms of suppressing the Auger processes. By carefully optimizing the waveguides and mitigating carrier heating
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Improvements of readout signal integrity in mid-infrared superconducting nanowire single-photon detectors Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Sahil R. Patel, Marco Colangelo, Andrew D. Beyer, Gregor G. Taylor, Jason P. Allmaras, Bruce Bumble, Emma E. Wollman, Matthew D. Shaw, Karl K. Berggren, Boris Korzh
Superconducting nanowire single-photon detectors (SNSPDs) in the mid-infrared (MIR) have the potential to open up numerous opportunities in fields such as exoplanet searches, direct dark matter detection, physical chemistry, and remote sensing. One challenge in pushing SNSPD sensitivity to the MIR is a decrease in the signal-to-noise ratio (SNR) of the readout signal, as the critical currents become
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Super-bit-resolution enabled by noise-tolerant temporal single pixel imaging Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Ryota Keyaki, Susumu Fukatsu
Super-bit-resolution implies the survival of data that could have been lost beyond the digitizing bit resolution. This yet unexplored ability to beat the bit threshold of output readings has been achieved by making temporal ghost imaging (TGI) virtually noiseless. To this end, acquired immunity against self-inflicting noise was granted by implementing orthogonalized illumination in one-time readout
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Electrical control of metal–insulator transition and magnetism in asymmetric multiferroic InCrX3 (X = S, Se) monolayers Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Yangyang Wu, Lei Cao, Guannan Li, Xiaokun Huang, Bingwen Zhang, Benling Gao, Guang Song
Electrical control of conductivity and magnetism in two-dimensional (2D) ferroelectric (FE) materials have attracted immense attention due to their fascinating properties and potential applications in designing field-effect transistors and high-density multistate data storage. Based on first-principles calculations and crystal field theory, we present an approach to obtain 2D intrinsic asymmetric multiferroics
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Optical realization of magneto-intersubband oscillations Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 M. L. Savchenko, A. A. Bykov, A. Shuvaev, A. K. Bakarov, A. Pimenov, O. E. Raichev
We report on the optical realization of the magneto-intersubband oscillations that have been measured in the sub-terahertz transmittance of a GaAs quantum well with two subbands occupied. Following their dc analogue, the oscillations are periodic in the inverse magnetic field with the period governed by the subband gap. Their magnitude and polarization dependence accurately follow the presented simplified
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Qualitatively and quantitatively predicting the front velocity in binary reactive systems Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Fabian Schwarz, Ralph Spolenak
Reactive multilayer systems, due to their fast and highly localized heat release, are widely applied in various technologies. To tailor their properties to specific applications, there is still a lot of ongoing research on the engineering and prediction of their reaction properties. In this work, the focus is going beyond multilayers to binary Al/Ni reactive systems. Based on molecular dynamics (MD)
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Terahertz magnon excitation in antiferromagnetic domain walls based on mass-energy equivalence Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Xu Ge, Peng Yan, Wei Luo, Shiheng Liang, Yue Zhang
The theory of special relativity is one of the most significant achievements in modern physics, with several important predictions such as time dilation, size contraction for a moving object, and mass-energy equivalence. Recent studies have demonstrated size contraction for an antiferromagnetic (AFM) domain wall (DW). Here, we show the excitation of terahertz (THz) magnons from a moving AFM DW under
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First-principles prediction of thermal conductivity of bulk hexagonal boron nitride Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Ziqi Guo, Zherui Han, Abdulaziz Alkandari, Krutarth Khot, Xiulin Ruan
Despite its importance, a sophisticated theoretical study of thermal conductivity in bulk h-BN has been lacking to date. In this study, we predict thermal conductivity in bulk h-BN crystals using first-principles predictions and the Boltzmann transport equation. We consider three-phonon (3ph) scattering, four-phonon (4ph) scattering, and phonon renormalization. Our predicted thermal conductivity is
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Ferroelectric capacitors with triple level cell storage capability at low operating voltage by introducing TiN interlayer Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Yi-Fan Chen, Hung-Yuan Shih, Chen-Hsin Wang, Chun-Yi Kuo, Yung-Hsien Wu
Inserting an ultrathin TiN interlayer into a ferroelectric HfZrOx (HZO) film of 10 nm by in situ ALD was proposed to implement ferroelectric capacitors (FeCAPs) in this work. The FeCAPs with the structure of TiN/HZO/TiN/HZO/TiN show a high remanent polarization (2Pr) of 32.6 μC/cm2 at a low operating voltage of 2 V and a pulse width of 5 μs. Compared to those without TiN interlayer, this work shows
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Precisely tunable and predictable index-near-zero modes across continuous and broad bands Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Panpan He, Yun Shen, Sanshui Xiao, Lujun Hong, Yun You, Kosmas L. Tsakmakidis, Yamei Luo, Jie Xu
In the past two decades, index-near-zero (INZ) modes and materials, with their spatial phase invariance and super coupling, gained increasing attention for applications in all-optical/quantum computing and communication. However, the modulation of INZ modes is typically complex and discontinuous, often achieved through intricate experimental methods, thereby hindering their widespread application.
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Enhancement of TN induced by magnetic dilution in the linear magnetoelectric Mn4Nb2O9 Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Antoine Maignan, Christine Martin
Ferroelectric polarization induced by the magnetic field is one of the properties reported in honeycomb antiferromagnetic linear magnetoelectrics (LME) belonging to the A4M2O9P3¯c1 class of corundum compounds with A = Co, Fe, and Mn and M = Nb or Ta. Among them, Mn4Nb2O9 exhibits the highest TN of 108 K. We show that it can even be increased by substituting partly Mn by Fe. The study of Mn4−xFexNb2O9
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An energy-band modulated p-GaN/InGaN/AlN p-channel MESFET with high ION/IOFF ratio and steep subthreshold swing Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Huake Su, Tao Zhang, Shengrui Xu, Hongchang Tao, Yuan Gao, Xu Liu, Lei Xie, Peng Xiang, Kai Cheng, Yue Hao, Jincheng Zhang
In this work, we report on the high-performance p-GaN/InGaN/AlN multi-heterostructure p-channel metal–semiconductor field effect transistors (MESFETs) with energy-band modulated quantum well-like InGaN channel and low work function metal tungsten (W) as the gate material. A negative threshold voltage (VTH) of −0.35 V is achieved by precisely controlling the self-aligned etching depth at the active
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Complementary optoelectronic interaction of n+-Si/p-Ge heterojunctions fabricated via transfer printing toward broadband photodetectors Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Pingling Lin, Qinglei Guo
Heterojunctions have been recognized as promising candidates for the fabrication of broadband photodetectors. However, currently demonstrated heterojunctions suffer from one or more disadvantages in limited light absorption, incompatible fabrication with the current semiconductor technology, and/or abundant interface defects induced by lattice/thermal mismatches. In this work, we use traditional elemental
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Far-gate synaptic transistors utilizing ion-charge dual-transfer mechanism for neurotransmitter-multiplexing temporal coding Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-17 Xi'an Li, Yanyan Feng, Lei Shi, Jianlin Zhou, Yao Ni
The ability of artificial synapses to replicate multiplexed-transmission is a significant advancement in emulating complex brain activities. However, it generally required more stringent material requirements of intrinsic-ambipolarity and more complex structures of P/N dual-channel. Here, we proposed a far-gate synaptic transistor (FGST) just using a single-channel composed of a common unipolar semiconductor
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Enhanced controllable triplet proximity effect in superconducting spin–orbit coupled spin valves with modified superconductor/ferromagnet interfaces Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-16 A. T. Bregazzi, J. A. Ouassou, A. G. T. Coveney, N. A. Stelmashenko, A. Child, A. T. N'Diaye, J. W. A. Robinson, F. K. Dejene, J. Linder, N. Banerjee
In a superconductor/ferromagnet hybrid, a magnetically controlled singlet-to-triplet Cooper pair conversion can modulate the superconducting critical temperature. In these triplet superconducting spin valves, such control usually requires inhomogeneous magnetism. However, in the presence of spin–orbit coupling from an interfacial heavy metal layer, the singlet/triplet conversion rate and, thus, critical
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Observation of energy localization in nonlinear non-Hermitian systems Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-16 Lei Dong, Dong-Yan Chen, Qing-An Huang
Energy localization in Hermitian systems has been utilized to generate ultra-sensitivity. Here, we report the interplay between non-Hermitian parity-time (PT) symmetry breaking and the mode localization transition. In our scheme, a PT-symmetric system consists of two coupled LC (inductor–capacitor) resonators: one has a linear loss and the other has a saturated gain described by a nonlinear model.
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Carrier tunneling and transport in coupled quantum wells: Modeling and experimental verification Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-16 Fuyi Cao, Zhan Su, Cong Wang, Yuhao Chen, Guoen Weng, Chang Wang, Xiaobo Hu, Hidefumi Akiyama, Junhao Chu, Shaoqiang Chen
We propose an approach to elucidate carrier dynamics by developing a robust rate equation model capable of explaining carrier dynamics in a dual-well system. To experimentally validate the accuracy and reliability of our model, we utilized a combination of time-resolved photoluminescence and spatially resolved cathodoluminescence measurements. The integration of these complementary techniques allowed
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Thermodynamic stability and ionic conductivity in lithium–germanium binary system Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-16 Anastasiia V. Iosimovska, Alexey P. Maltsev, Ilya V. Chepkasov, Artem R. Oganov
Lithium–germanium binary compounds are promising anode materials for secondary lithium-ion batteries due to their high capacity, low operating voltage, and high electronic conductivity of lithiated Ge. For their successful application in batteries, it is essential to know the temperature stability of different Li–Ge phases and the variation of their ionic conductivity depending on the operating temperatures
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Exploring the influence of the contact resistance on perovskite phototransistors Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Lijian Chen, Quanhua Chen, Hong Zhu, Runfeng Wang, Yiping Wu, Run Li, Li Zhu, Guangan Yang, Xiang Wan, Xing Zhao, Zhihao Yu, Binhong Li, Chee Leong Tan, Huabin Sun, Yong Xu
Organic–inorganic hybrid perovskites are widely used in photodetection owing to their high optical absorption coefficients. A variety of research has been conducted on perovskite phototransistors and their optoelectronic properties, but the exploration of the influence of contact resistance remains limited. In this work, we employed the transmission-line method to separate the contact resistance Rc
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Ultrafast self-transportation and efficient separation of organic droplets on semi-conical asymmetric structure Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Yi Yang, Qinrui Zou, Hesong Ren, Yuan Wang, Xiao Yao, Chenghong Guo, Lijie Zhuo, Yuanchong Xu, Yuegan Song, Kefeng Xiang, Guoqiang Li
Manipulating oil droplets in an aqueous solution is highly desirable for organic multiphase liquid separation. Despite substantial works in the realm of organic multiphase liquid manipulation and separation, the ultrafast transportation and efficient and precise separation of these liquids, especially those with varied surface tensions, encounters significant challenges due to little driving forces
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Photonic crystal-coupled enhanced steering emission: A prism-free, objective-free, and metal-free loss-less approach for biosensing Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Seemesh Bhaskar, Weinan Liu, Joseph Tibbs, Brian T. Cunningham
Diagnostic assays utilizing fluorescent reporters in the context of low abundance biomarkers for cancer and infectious disease can reach lower limits of detection through efficient collection of emitted photons into an optical sensor. In this work, we present the rational design, fabrication, and application of one-dimensional photonic crystal (PC) grating interfaces to accomplish a cost-effective
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A flexible thermal-coupled InGaZnO adaptive synapse Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Mingtao Xu, Haotian Long, Chuanyu Fu, Huiwu Mao, Changjin Wan, Qing Wan
The development of neuromorphic sensory systems necessitates synaptic devices with adaptivity to a wide range of stimuli. Furthermore, the introduction of multimodal adaptivity is highly favorable, which holds immense potential for improving the processing capability of the neuromorphic system under complex environments. In this work, we report a thermal-coupled adaptive synapse (TCAS) by integrating
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Predicting thermal transport properties in phononic crystals via machine learning Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Liyuan Dong, Wei Li, Xian-He Bu
Although anisotropic phononic crystals (PnCs) could be utilized to control the phonon dispersions and thermal transports, rapidly discovering their properties presents a significant challenge due to the enormous consumption of traditional computational methods. In this study, we have developed machine learning techniques to forecast the thermal conductance of anisotropic PnCs (GPnC and GPnC/Gmem) based
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Switchable Faraday laser with frequencies of 85Rb and 87Rb 780 nm transitions using a single isotope 87Rb Faraday atomic filter Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Xiaomin Qin, Zijie Liu, Hangbo Shi, Zhiyang Wang, Xiaolei Guan, Tiantian Shi, Jingbiao Chen
In the development of atomic physics, laser sources with Frequencies corresponding to atomic transition and high stability are essential. The Faraday laser is a special diode laser using the Faraday anomalous dispersion optical filter (FADOF) to realize frequency selection, so the output laser frequency is automatically limited to the atomic Doppler broadening. However, the frequency of a Faraday laser
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Excellent sodium metal deposition enabled by three-dimensional porous structures with natrophilic Ni-Sn alloy Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Xiang Sun, Xia Wang, Lixiao Xiang, Yunfei Wang, Yuanhao Wang, Na Li, Wei Deng, Wenhua Yang, Shandong Li
Na metal has long been an ideal potential anode material for sodium secondary batteries due to its own superiority; however, the Na dendrite problem during cycling makes it face a great obstacle in application. Here, we grow sodiophilic thin film materials with tin and nickel-tin components uniformly on three-dimensional nickel foam (3D-Ni) to obtain a 3D sodiophilic composite framework (namely 3D-NiSn)
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Probing rotated Weyl points on one-dimensional sonic crystals Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Xu Zhang, Chengxin Deng, Yiqin Yang, Jin Li, Yingjian Yu, Hai Yang
Recently, researchers have devoted their intense efforts to investigating Weyl physics in synthetic space. In this Letter, we study the intriguing topological rotated Weyl physics in a three-dimensional parameter space, which consists of two extra structural parameters and the wave vector of a simple one-dimensional sonic crystal. In our ultrasonic experiments, we observe that the topological interface
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AFM-IR study of interfacial nanostructures in high-temperature dilute nanocomposites Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Wenyi Zhu, Guanchun Rui, Maxwell Turner Wetherington, Jongcheol Lee, Seong H. Kim, Q. M. Zhang
The dilute nanocomposite strategy facilitates a promising route for high-temperature polymer dielectrics to achieve high dielectric constant and energy density, robust breakdown strength, and low loss. The dielectric enhancement of the dilute nanocomposites strongly ties to the topological conditions of the nanofiller–polymer interface. Here, atomic force microscopy-based infrared spectroscopy was
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Influence of interposed graphene sheets on mechanical and electronic properties of Al/graphene superlattice Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Jong-Hyok Jang, Kum-Chol Ri, Song-Jun Kim, Sin-Hyok Jon, Chol-Jun Yu
Graphene-reinforced aluminum matrix composites have drawn remarkable attention in several fields of high-tech industries, but the understanding of their material properties remains unclear. This work reports a first-principles study of interface binding nature, mechanical strength, and electronic properties of aluminum/graphene (Al/G) composites using superlattice models as varying graphene content
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Deep field-of-view and passive tomography based on Airy light field Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Siyuan Wang, Zonglin Guo, Yu Zhao, Yanbo Pei, Hongyan Shi, Jingbo Zhang, Jian Wang
We introduce a passive tomography method with deep field of view up to 90 m based on the self-acceleration characteristics of Airy beams. A post-modulation long-distance imaging system was proposed and optimized in its optical configuration and phase modulation parameters. The resolution was analyzed based on theoretical simulation. Experimentally, three LEDs at various distances around 10 m and two
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High ODMR contrast and alignment of NV centers in microstructures grown on heteroepitaxial diamonds Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Jan Engels, Jürgen Weippert, Tingpeng Luo, Jan Kustermann, Patricia Quellmalz, Niklas Mathes, Lukas Lindner, Christian Giese, Lutz Kirste, Peter Knittel, Jan Jeske, Vadim Lebedev
Heteroepitaxial chemical vapor deposition is the most promising option to fabricate wafer-scale monocrystalline diamonds for quantum applications. Previously, we demonstrated the feasibility to manufacture functional micrometer-sized pyramids on as-grown heteroepitaxial diamond as well as their quantum optical characteristics. Due to high background signals and microfabrication challenges, these pyramids
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The stability analysis of In–Ga–ZnO thin film transistors with polyimide substrates based on Maxwell–Wagner effect Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Zongchi Bao, Bin Liu, Xianwen Liu, Shuo Zhang, Le Weng, Haoran Sun, Xi Zhang, Qi Yao, Guangcai Yuan, Jian Guo, Ce Ning, Dawei Shi, Feng Wang, Zhinong Yu
Flexible organic light-emitting diode display devices fabricated on polyimide (PI) substrates have more obvious residual image problems due to the abnormal threshold-voltage (Vth) shifts of a thin film transistor (TFT). In this paper, the Vth shift of TFT fabricated on a PI substrate was analyzed. We explained the worse bias stability and worse recovery of TFT with a PI substrate compared with TFT
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Perpendicular magnetic anisotropy in permalloy ultrathin film grown on RuO2(101) surface Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Yunzhuo Wu, Yongwei Cui, Tong Wu, Ke Pei, Haoran Chen, Hongyue Xu, Wentao Qin, Tianping Ma, Renchao Che, Zhe Yuan, Yizheng Wu
Permalloy (Py) films are commonly regarded as soft magnetic materials, wherein the magnetization aligns within the film plane. Our studies reveal the presence of perpendicular magnetic anisotropy in Py thin films deposited on the collinear antiferromagnetic RuO2(101) surface. By employing both the magneto-optical Kerr effect and the anomalous Hall effect, we identified the interfacial origin of the
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Nano-kirigami/origami fabrications and optical applications Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Yingying Chen, Xiaowei Li, Lan Jiang, Yang Wang, Jiafang Li
Emerging nano-kirigami/origami technology enables the flexible transformations of 2D planar patterns into exquisite 3D structures in situ and has aroused great interest in the areas of nanophotonics and optoelectronics. This paper briefly reviews some milestone research and breakthrough progresses in nano-kirigami/origami from the aspects of stimuli approaches and application directions. Versatile
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Surface-state-related carrier dynamics of GaAs determined by UV-visible pump-probe terahertz spectroscopy Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 D. Zhai, E. Hérault, F. Garet, J.-L. Coutaz
The surface velocity and the bulk lifetime of photo-excited free carriers in GaAs were measured using an optical-pump and THz-probe time-domain technique. By varying the pump laser photon energy from 1.56 to 4.15 eV, we observe that the surface velocity drops abruptly from 0.7×106 cm/s down to 0.2×106 cm/s at 2.5 eV, while the bulk lifetime remains almost constant. We tentatively explain this step-like
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Femtosecond laser-textured superhydrophilic coral-like structures spread AgNWs enable strong thermal camouflage and anti-counterfeiting Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Tingni Wu, Kai Yin, Jiaqing Pei, Yuchun He, Ji-An Duan, Christopher J. Arnusch
Modulating the thermal emission of a material in the infrared (IR) range can be essential for various practical applications such as smart textiles, camouflage, and anti-counterfeiting. Although many different materials or structures have been proposed, the complex manufacturing processes are still hindering their widespread use. Herein, a facile femtosecond laser processing technology and a drop-coating
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Thick crack-free {113} epitaxial boron-doped diamond layers for power electronics—Deposition with nitrogen addition and high microwave power Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Mahebub Alam, Pavel Hubik, Zuzana Gedeonova, Ladislav Fekete, Jaromir Kopecek, Andrew Taylor, Vincent Mortet
In this work, first, we investigate the effect of nitrogen addition in microwave plasma enhanced chemical vapor deposition on the growth of thick {113} epitaxial diamond layers. We identify a narrow range of nitrogen concentrations for the growth of crack-free thick epitaxial layers with a smooth surface morphology. Without nitrogen, cracks start to appear after a layer thickness of 7–10 μm due to
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Acoustic and optical phonons in quasi-two-dimensional MPS3 antiferromagnetic semiconductors Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Dylan Wright, Zahra Ebrahim Nataj, Erick Guzman, Jake Polster, Menno Bouman, Fariborz Kargar, Alexander A. Balandin
We report the results of the investigation of the acoustic and optical phonons in quasi-two-dimensional antiferromagnetic semiconductors of the transition metal phosphorus trisulfide family with Mn, Fe, Co, Ni, and Cd as metal atoms. The Brillouin–Mandelstam and Raman light scattering spectroscopies were conducted at room temperature to measure the acoustic and optical phonon frequencies close to the
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Write error rate analysis of field-free spin-orbit torque switching in conically magnetized free layer nanomagnet Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Pinkesh Kumar Mishra, Swapnil Bhuktare
Enhancing the performance of magnetic random access memories (MRAMs) is crucial, considering speed, energy efficiency, and endurance. Spin-orbit torque-based MRAMs offer ultrafast operation and enhanced reliability. Still, the energy efficiency and external magnetic field requirement for deterministic switching of nanomagnets with perpendicular magnetic anisotropy (PMA) are a significant hurdle. To
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Experimental demonstration of complex four-wave mixing processes with pump of orbital-angular-momentum superposition mode Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Xiaozhou Pan, Sheng Yu, Kai Zhang, Jietai Jing
Orbital angular momentum (OAM), characterized by a topological charge ℓ (ℓ integer), serves as a promising vehicle for carrying quantum information. Generating a nonclassical field involving two or more OAM modes can largely enhance the data-carrying capacity of quantum information processing. In this Letter, we present the implementation of a four-wave mixing (FWM) process, featuring a pump beam of
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Synthesis and resistive switching performance of lead-free double perovskite Cs2AgBiBr6 films Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Fanju Zeng, Yongqian Tan, Wei Hu, Xiaosheng Tang, Haifeng Yin, Tao Jing, Lianshuai Huang, Yi Yang, Juan Liao, Changmin Zhou
In recent years, the lead-free double perovskite Cs2AgBiBr6 has emerged as an appealing alternative to lead-based perovskites due to its nontoxicity and long-term stability. In this study, we employed methyl acetate as an antisolvent and prepared high-quality Cs2AgBiBr6 films by a facile one-step spin-coating method. The prepared films exhibited excellent crystallinity with densely packed crystal grains
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Efficiency of diode effect in asymmetric inline long Josephson junctions Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 C. Guarcello, S. Pagano, G. Filatrella
An effective superconducting diode—that is an element whose critical current depends upon the polarity—is achieved with a special configuration of a long Josephson junction and a control line. The proposed geometry is simple, based on the well-established asymmetric inline long Josephson junction, and can be realized using traditional superconductors without the need of magnetic materials. The performance
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On-chip topological phononic crystal acoustic waveguide based on lithium niobate thin films Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Xuankai Xu, Yushuai Liu, Tao Wu
This Letter introduces an on-chip topological phononic crystal (PnC) acoustic waveguide employing lithium niobate thin films. Utilizing a C3v symmetry-breaking mechanism, the topological PnC acoustic waveguide is achieved, operating at frequencies exceeding 430 MHz. A SH0 mode acoustic transceiver is designed, enabling highly efficient on-chip acoustic wave transmission and reception. The fabricated
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Janus tetragonal Mn2BN monolayer: A 2D polar half-metal with coexistent ferroelectricity and magnetism Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Xu Yan, Junyuan Wang, Sheng Wang, Yong Liu, Liangzhi Kou, Guochun Yang
The integration of ferroelectricity, ferromagnetism, and half-metallicity in two-dimensional (2D) materials is pivotal for advancing spintronic device technologies. However, the progress in identifying such materials is limited, and we here propose a compelling approach by constructing asymmetry structures (Janus) based on known 2D magnets, namely, the Janus tetragonal Mn2BN monolayer as a promising
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Chiral structure induces spatial spiral arrangement of Fe3O4 nanoparticles to optimize electromagnetic wave dissipation Appl. Phys. Lett. (IF 4.0) Pub Date : 2024-04-15 Yongpeng Zhao, Nan Wang, Huaifeng Wang, Shenglin Yuan, Mengmeng Liu, Hui Huang, Yang Zhao, Yuchao Wang, Zhijun Wu, Xin Guo, Lijia Xu
The spatial anisotropic arrangement of magnetic particles is expected to increase the magnetic resonance frequency of magnetic particles and optimize the magnetic loss. Herein, helical carbon nanocoils were used as a chiral template to induce the spatial spiral distribution of Fe3O4 particles. Meanwhile, a linear control group was constructed with carbon nanofibers as a template. The three-dimensional