Semiconductor-Bloch Formalism: Derivation and Application to High-Harmonic Generation from Dirac Fermions

URN to cite this document:: urn:nbn:de:bvb:355-epub-437753
DOI to cite this document:: 10.5283/epub.43775

Wilhelm, Jan ; Grössing, Patrick ; Crewse, Jack ; Nitsch, Maximilian ; Weigl, Leonard ; Schmid, Christoph P. ; Evers, Ferdinand

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Date of publication of this fulltext: 21 Sep 2020 09:54

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Abstract

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 ...