论文标题
（tase4）2i真的有轴子电荷密度波吗？
Does (TaSe4)2I really harbor an axionic charge density wave?
论文作者
论文摘要
最近的一项实验工作报道了准电荷波（CDW）滑动模式的非线性电导率过高，当时将磁场涂在电场上[Gooth等人，自然575，315（2019）]。该结果打开了一种概念方法，其中（Tase4）2i中的CDW间隙在相反手性的Weyl Fermions之间打开，并假设该化合物是其未呈现的高温阶段中的Weyl Semi-Metal。我们报告在类似条件下进行的（Tase4）2i的滑动状态的测量值。我们发现磁导率没有增加。为了理解这种令人不安的差异，我们强调了（tase4）2i中PEIERLS转变的特定性质，以及该化合物中存在的强电子偶联。鉴于缺乏进一步的证据，我们认为断言（Tase4）2i是轴基绝缘体为时过早。
A recent experimental work has reported an excess of the non-linear conductivity in the charge density wave (CDW) sliding mode of the quasi one-dimensional compound (TaSe4)2I, when a magnetic field is applied co-linearly to the electric field [Gooth et al., Nature 575, 315 (2019)]. This result has opened a conceptual approach, where the CDW gap in (TaSe4)2I is opened between Weyl fermions of opposite chirality with the assumption that this compound is a Weyl semi-metal in its undistorted high temperature phase. We report measurements in the sliding state of (TaSe4)2I performed in similar conditions. We have found no increase in the magnetoconductivity. In our attempts for understanding this unsettling discrepancy, we stress the specific nature of the Peierls transition in (TaSe4)2I and the strong electron-phonon coupling present in this compound. Given the lack of further evidence, we think that it is premature to assert that (TaSe4)2I is an axionic insulator.
