Optical absorption in interacting and nonlinear Weyl semimetals
arXiv:1704.08939 · doi:10.1103/PhysRevB.96.075126
Abstract
It has been recently predicted that the interplay between Coulomb interactions and Berry curvature can produce interesting optical phenomena in topologically nontrivial two-dimensional insulators. Here, we present a theory of the optical absorption for three-dimensional, hole-doped Weyl semimetals. We find that the Berry curvature, Coulomb interactions and the nonlinearity in the single-particle energy spectrum can together enable a light-induced valley polarization. We support and supplement our numerical results with an analytical toy model calculation, which unveils topologically nontrivial Mahan excitons with nonzero vorticity.
17 pages, 12 figures (submitted)
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- Magneto-optical Kerr effect and signature of the chiral anomaly in a Weyl semimetal in a magnetic field
- Complete optical valley polarization in Weyl semimetals in strong magnetic fields
- Quantum anomaly and anomalous Josephson effect in inversion asymmetric Weyl semimetals
- Valley polarization generated in 3-dimensional group-IV monochalcogenids