Resonant optical topological Hall conductivity from skyrmions
Sopheak Sorn,
Luyi Yang,
Arun Paramekanti
Abstract:We study the high frequency Hall conductivity in a two-dimensional (2D) model of conduction electrons coupled to a background magnetic skyrmion texture via an effective Hund's coupling term. For an ordered skyrmion crystal, a Kubo formula calculation using the basis of skyrmion crystal Chern bands reveals a resonant Hall response at a frequency set by the Hund's coupling: ωres ≈ JH . A complementary real-space Kubo formula calculation for an isolated skyrmion in a box reveals a similar resonant Hall response. … Show more
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