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 study WSMs with a pair of tunable Weyl nodes. We point out that each Weyl node can be tuned freely, leading to three types of WSMs with different tilt strengths: types I, II, and 1.5. We study chiral modes, surface Fermi arcs, and quantum anomalous Hall effect to show the properties of a combination of independent nodes. In addition, we present an experimental setup to realize the different types of WSMs based on a timely technique.
1 More- Received 2 August 2016
DOI:https://doi.org/10.1103/PhysRevA.95.033629
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