Over the last few years, significant attention has been devoted to studying the kagome materials A V₃Sb₅ (A = K, Rb, Cs) due to their unconventional superconductivity and charge density wave (CDW) ordering. Recently \({{{{\rm{ScV}}}}}_{6}{{{{\rm{Sn}}}}}_{6}\) was found to host a CDW below ≈ 90 K, and, like A V₃Sb₅, it contains a kagome lattice comprised only of V ions. Here we present a comprehensive magnetotransport study on \({{{{\rm{ScV}}}}}_{6}{{{{\rm{Sn}}}}}_{6}\). We discovered several anomalous transport phenomena above the CDW ordering temperature, including insulating behavior in interlayer resistivity, a strongly temperature-dependent Hall coefficient, and a violation of Kohler’s rule. All these anomalies can be consistently explained by a progressive decrease in carrier densities with decreasing temperature, suggesting the formation of a pseudogap. Our findings suggest that high-temperature CDW fluctuations play a significant role in determining the normal state electronic properties of \({{{{\rm{ScV}}}}}_{6}{{{{\rm{Sn}}}}}_{6}\).

在过去的几年里， 由于Kagome 材料A V ₃ Sb ₅ ( A = K、Rb、Cs) 的非常规超导性和电荷密度波 (CDW) 有序性，人们对它们的研究给予了极大的关注。最近发现 \({{{{\rm{ScV}}}}}_{6}{{{{\rm{Sn}}}}}_{6}\) 的 CDW 低于 ≈ 90 K，并且，与A V ₃ Sb ₅相同，含有仅由V离子构成的戈薇晶格。在这里，我们提出了对 \({{{{\rm{ScV}}}}}_{6}{{{{\rm{Sn}}}}}_{6}\) 的全面磁输运研究。我们发现了高于 CDW 有序温度的几种异常输运现象，包括层间电阻率的绝缘行为、强烈依赖温度的霍尔系数以及违反科勒规则。所有这些异常现象都可以通过载流子密度随着温度降低而逐渐降低来解释，这表明赝能隙的形成。我们的研究结果表明，高温 CDW 波动在确定\({{{{\rm{ScV}}}}}_{6}{{{{\rm{Sn}} 的正常态电子特性方面发挥着重要作用}}}_{6}\)。