Response functions for electric field induced two-dimensional nonlinear spectroscopy in a Kitaev magnet
Wolfram Brenig,
Olesia Krupnitska
Abstract:We study the dynamical response functions relevant for electric field induced two-dimensional (2D) coherent nonlinear optical spectroscopy in a Kitaev magnet at finite temperature. We show that these response functions are susceptible to both types of fractional quasiparticles of this quantum spin-liquid, i.e., fermions and flux visons. Focusing on the second order response, we find a strong antidiagonal feature in the 2D frequency plane, related to the galvanoelectric effect of the fractional fermions. Perpe… Show more
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