Optical conductivity of multi-Weyl semimetals

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.

5 pages, 4 figures + supplementary material (14 pages)

References in corpus (3)

• Chiral anomaly and optical absorption in Weyl semimetals
• Topological Weyl Semi-metal from a Lattice Model
• Optical Conductivity of Weyl Semimetals and Signatures of the Gapped Semimetal Phase Transition

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