论文标题
拓扑半学ZRTE5
Gigantic magnetochiral anisotropy in the topological semimetal ZrTe5
论文作者
论文摘要
反转对称性损坏的拓扑材料会引起非偏置响应，例如通过磁场各向异性控制磁场控制的当前整流。散装的非重新反应反应通常源自相对论校正，并且总是很小。在这里，我们报告发现，ZRTE5晶体靠近拓扑量子相变近似巨大的磁性磁盘各向异性，这是迄今为止观察到的最大的。我们认为，载流子密度，不均匀性和圆环形状的费米表面是通过狄拉克材料中的反演对称性引起的，这是解释这种非凡特性的核心。
Topological materials with broken inversion symmetry can give rise to nonreciprocal responses, such as the current rectification controlled by magnetic fields via magnetochiral anisotropy. Bulk nonreciprocal responses usually stem from relativistic corrections and are always very small. Here we report our discovery that ZrTe5 crystals in proximity to a topological quantum phase transition present gigantic magnetochiral anisotropy, which is the largest ever observed to date. We argue that a very low carrier density, inhomogeneities, and a torus-shaped Fermi surface induced by breaking of inversion symmetry in a Dirac material are central to explain this extraordinary property.
