Tunable Weyl Semi-metal and its Possible Realization in Optical Lattice

Abstract

Weyl semimetal (WSM) is an exotic topological state in condensed matter physics. In this paper, based on a two-band cubic lattice model, we studied WSMs with a pair of tunable Weyl nodes. It is pointed out that there exist three types of WSMs with different tilt strengths: type-I WSM, type-II WSM and type-1.5 WSM. In particular, type-1.5 WSM has one type-I node and one type-II node. We studied chiral modes, surface Fermi arcs and quantum anomalous Hall effect in different types of WSMs. In addition, we give an experimental setup to realize the different types of WSMs based on timely technique.

arXiv comment5 pages, 4 figures

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• Conductance modulation in Weyl semimetals with tilted energy dispersion without a band gap
• Topological metal bands with double-triple-point fermions in optical lattices
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• Fermi Arcs in Tilted Weyl Semimetals: Classification, Evolution and Transport Properties
• Bosonic Weyl excitations induced by $p$-orbital interactions in a cubic optical lattice