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arXiv · 2312.14244

Absence of quantization in the circular photogalvanic effect in disordered chiral Weyl semimetals

Ang-Kun Wu·Daniele Guerci·Yixing Fu·Justin H. Wilson·J. H. Pixley
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Abstract

The circularly polarized photogalvanic effect (CPGE) is studied in chiral Weyl semimetals with short-ranged quenched disorder. Without disorder, the topological properties of chiral Weyl semimetals lead to the quantization of the CPGE, which is a second-order optical response. Using a combination of diagrammatic perturbation theory in the continuum and exact numerical calculations via the kernel polynomial method on a lattice model we show that disorder perturbatively destabilizes the quantization of the CPGE.

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Ang-Kun Wu, Daniele Guerci, Yixing Fu, Justin H. Wilson, J. H. Pixley. 2023-12-21. Absence of quantization in the circular photogalvanic effect in disordered chiral Weyl semimetals. https://doi.org/10.1103/physrevb.110.014201

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