Topological Weyl semi-metal from a lattice model
Topological Weyl semi-metal from a lattice model
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DOI：
10.1209/0295-5075/97/67004
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发表时间：
2012-03-01
期刊：
影响因子：
1.8
通讯作者：
Carpentier, David
中科院分区：
文献类型：
--
作者：
Delplace, Pierre;Li, Jian;Carpentier, David
我们定义和研究了一个三维晶格模型，显示外尔半金属相。该模型由量子（反常）霍尔绝缘体的耦合层组成。外尔半金属相出现在量子霍尔绝缘相和正常绝缘相之间。这种外尔半金属中的外尔费米子，类似于石墨烯中的狄拉克费米子，其晶格赝自旋锁定在其动量上。我们调查的表面状态和费米弧，以及它们的演变为不同的阶段，通过精确对角化的晶格模型，以及通过分析它们的拓扑起源。版权所有（C）EPLA，2012
We define and study a three-dimensional lattice model which displays a Weyl semi-metallic phase. This model consists of coupled layers of quantum (anomalous) Hall insulators. The Weyl semi-metallic phase appears between a resulting quantum Hall insulating phase and a normal insulating phase. Weyl fermions in this Weyl semi-metal, similar to Dirac fermions in graphene, have their lattice pseudo-spin locked to their momenta. We investigate surface states and Fermi arcs, and their evolution for different phases, by exactly diagonalizing the lattice model as well as by analyzing their topological origins. Copyright (C) EPLA, 2012