论文标题
在NBP的量子振荡中，严重违反Wiedemann-Franz法律
Severe violation of the Wiedemann-Franz law in quantum oscillations of NbP
论文作者
论文摘要
研究了Weyl半分NBP的热导率（K），并平行于[0 0 1]方向施加的热梯度和磁场。在低温下，k（b）表现出很大的量子振荡，频率与从shubnikov -de haas效应确定的几个频率相匹配，这些效应在同一样品上，具有类似的电流和磁场方向。 K（b）中发现的两个频率均来自封闭一对Weyl节点的电子口袋。热导率的振荡分量的振幅被证明是使用Wiedemann -Franz定律根据电导率计算得出的相应值的两个数量级。对这种差异的可能来源的分析表明，手性零声音效应是其外观的潜在原因。
The thermal conductivity (k) of the Weyl semimetal NbP was studied with the thermal gradient and magnetic field applied parallel to [0 0 1] direction. At low temperatures k(B) exhibits large quantum oscillations with frequencies matching two of several determined from the Shubnikov - de Haas effect measured on the same sample with analogous electrical current and magnetic field orientation. Both frequencies found in k(B) originate from the electron pocket enclosing a pair of Weyl nodes. The amplitude of the oscillatory component of the thermal conductivity turns out to be two orders of magnitude larger than the corresponding value calculated from the electrical conductivity using the Wiedemann - Franz law. Analysis of possible sources of this discrepancy indicates the chiral zero sound effect as a potential cause of its appearance.
