Jan Wilhelm, Patrick Grössing, Jack Crewse, Maximilian Nitsch, Leonard Weigl, Christoph Schmid, Ferdinand Evers
Published 2020-08-07Version 1
We rederive the semiconductor Bloch equations emphasizing the close link to the Berry connection. Our rigorous derivation reveals the existence of a third contribution to the (longitudinal) current in addition to the traditional intraband and polarization-related interband terms. The novel term becomes sizable in situations where the dipole-matrix elements are strongly wave-number dependent. We apply the formalism to high-harmonic generation for a Dirac metal. The novel term adds to the frequency-dependent emission intensity (high-harmonic spectrum) significantly at certain frequencies reaching up to 90% of the total signal.
Derivation of effective spin-orbit Hamiltonians and spin lifetimes, with application to SrTiO$_3$ heterostructures
Parallel quantized charge pumping
Macroscopic quantum tunneling in quartic and sextic potentials: application to a phase qubit
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