外尔半金属中由电磁场诱导的I型和II型光谱共存。

The induced by an electromagnetic field coexistence of types I and II spectra in Weyl semimetals.

作者信息

Alisultanov Zaur Z

机构信息

Amirkhanov Institute of Physics, Russian Academy of Sciences, Dagestan Science Centre, Makhachkala, Russia.

Dagestan State University, Makhachkala, Russia.

出版信息

Sci Rep. 2018 Sep 12;8(1):13707. doi: 10.1038/s41598-018-32104-y.

DOI:10.1038/s41598-018-32104-y

PMID:30209410

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6135849/

Abstract

Due to their unique properties, Weyl semimetals (WSMs) are promising materials for the future electronics. Currently, the two types (I and II) of WSMs are discovered experimentally. These types of WSMs differ from each other in their topological properties. In this paper we showed that a coexistence of types I and II Weyls spectra is possible in some WSMs under crossed magnetic and electric fields. This is possible in systems with non-equivalent Weyl points (WPs). In particular, it is possible in strained WSMs. Such phase, controlled by electromagnetic field, is principally new for topological matter physics. It is obvious, that in this regime new features of electron transport will appear. We showed that this effect can also be considered as a mechanism of strain induced type-I-type-II transition.

摘要

由于其独特的性质，外尔半金属（WSMs）是未来电子学领域很有前景的材料。目前，已通过实验发现了两种类型（I型和II型）的外尔半金属。这些类型的外尔半金属在拓扑性质上彼此不同。在本文中，我们表明，在交叉磁场和电场下，某些外尔半金属中可能存在I型和II型外尔光谱的共存。这在具有不等价外尔点（WPs）的系统中是可能的。特别是，在应变外尔半金属中是可能的。这种由电磁场控制的相对于拓扑物质物理学来说本质上是全新的。显然，在这种情况下会出现电子输运的新特征。我们表明，这种效应也可以被视为应变诱导的I型 - II型转变的一种机制。