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arXiv · 1609.08566

Optical conductivity of multi-Weyl semimetals

Seongjin Ahn·E. J. Mele·Hongki Min
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Abstract

Multi-Weyl semimetals are new types of Weyl semimetals which have anisotropic non-linear energy dispersion and a topological charge larger than one, thus exhibiting a unique quantum response. Using a unified lattice model, we calculate the optical conductivity numerically in the multi-Weyl semimetal phase and in its neighboring gapped states, and obtain the characteristic frequency dependence of each phase analytically using a low-energy continuum model. The frequency dependence of longitudinal and transverse optical conductivities obeys scaling relations that are derived from the winding number of the parent multi-Weyl semimetal phase and can be used to distinguish these electronic states of matter.

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Seongjin Ahn, E. J. Mele, Hongki Min. 2017-04-27. Optical conductivity of multi-Weyl semimetals. https://doi.org/10.1103/physrevb.95.161112

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