Topological Weyl Semi-metal from a Lattice Model

Abstract

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.

Accepted version for publication in EPL. 6 pages, 4 figures

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Cited by in corpus (6)

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• Consequences of a condensed matter realization of Lorentz violating QED in Weyl semi-metals
• Chiral anomaly, Charge Density Waves, and Axion Strings from Weyl Semimetals
• Superconductivity of doped Weyl semimetals: finite-momentum pairing and electronic analogues of the 3He-A phase
• Friedel oscillations due to Fermi arcs in Weyl semimetals
• Electron Correlation Induced Spontaneous Symmetry Breaking and Weyl Semimetal Phase in a Strongly Spin-Orbit Coupled System