Recent developments in transport phenomena in Weyl semimetals
Recent developments in transport phenomena in Weyl semimetals
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DOI：
10.1016/j.crhy.2013.10.010
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发表时间：
2013-11-01
影响因子：
1.4
通讯作者：
Qi, Xiaoliang
中科院分区：
文献类型：
--
作者：
Hosur, Pavan;Qi, Xiaoliang
在过去的十年中，通过对石墨烯和拓扑绝缘体的研究播种的系统的科学和工程方面取得了巨大进步。尽管石墨烯的频带结构在两个维度上模拟了无质量的相对论电子，但拓扑绝缘子的带中具有一定的抽象意义上的动量空间，从而在动量空间上挥动。在过去的几年中，热情一直在另一个非常规和拓扑（尽管与拓扑绝缘子的意义不完全相同）阶段 - Weyl Semimetal。在此阶段，电子模仿在高能物理学中众所周知的Weyl Fermions，并继承了其许多特性，包括明显违反了被称为手性异常的电荷保护。在这篇综述中，我们回顾了到目前为止文献中讨论的Weyl半学的一些异常的运输特性，重点是签名，其根部存在于异常。我们还提到了在凝结物质系统中对此阶段的几个实现，因为它们首先是对Weyl半学的促进活性。 （c）2013 Academie des Sciences。由Elsevier Masson SAS出版。版权所有。
The last decade has witnessed great advancements in the science and engineering of systems with unconventional band structures, seeded by studies of graphene and topological insulators. While the band structure of graphene simulates massless relativistic electrons in two dimensions, topological insulators have bands that wind non-trivially over momentum space in a certain abstract sense. Over the last couple of years, enthusiasm has been burgeoning in another unconventional and topological (although, not quite in the same sense as topological insulators) phase - the Weyl semimetal. In this phase, electrons mimic Weyl fermions that are well known in high-energy physics, and inherit many of their properties, including an apparent violation of charge conservation known as the chiral anomaly. In this review, we recap some of the unusual transport properties of Weyl semimetals discussed in the literature so far, focusing on signatures whose roots lie in the anomaly. We also mention several proposed realizations of this phase in condensed matter systems, since they were what arguably precipitated activity on Weyl semimetals in the first place. (C) 2013 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.