We report the temperature–pressure phase diagram of a UTe₂ single crystal that does not undergo a bulk superconducting transition but shows filamentary superconductivity with a critical transition temperature of 1 K at ambient pressure. Electrical-resistivity measurements reveal that the evolution of the filamentary superconducting state under pressure resembles the behavior observed in previous reports on bulk superconducting samples. AC calorimetry, however, does not show evidence for either bulk superconductivity or magnetism for pressures up to 1.6 GPa. Our results highlight the role of inhomogeneity in chemical-vapor-transport-grown UTe₂ samples and serve as a cautionary tale when probing electrical resistivity alone.

中文翻译：

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非超导 UTe2 的静水压力研究

_{我们报告了UTe 2}单晶的温度-压力相图，该单晶没有经历体超导转变，但在环境压力下表现出丝状超导，临界转变温度为1 K。电阻率测量表明，压力下丝状超导状态的演变类似于之前关于块状超导样品的报告中观察到的行为。然而，交流量热法并未显示压力高达 1.6 GPa 时体超导性或磁性的证据。我们的结果强调了化学蒸气传输生长的 UTe ₂样品中不均匀性的作用，并在单独探测电阻率时起到了警示作用。