Chiral Photocurrent in Parity-Violating Magnet and Enhanced Response in Topological Antiferromagnet

Rectified electric current induced by irradiating light, a so-called photocurrent, is an established phenomenon in optoelectronic physics. In this paper, we present a comprehensive classification of the photocurrent response arising from the parity violation in bulk systems. We clarify the contrasti...

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Bibliographic Details
Published inPhysical review. X Vol. 11; no. 1; p. 011001
Main Authors Watanabe, Hikaru, Yanase, Youichi
Format Journal Article
LanguageEnglish
Published College Park American Physical Society 01.01.2021
Subjects
Antiferromagnetism
Circular polarization
Classification
Condensed matter physics
Cones
Electric currents
Electrons
Fermi surfaces
Gyration
Interdisciplinary studies
Light
Linear polarization
Magnetic materials
Magnets
Mathematical analysis
Optoelectronic devices
Parity
Photoelectric effect
Photoelectric emission
Physics
Polarized light
Spintronics
Symmetry
Topology
Wave functions
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Summary:Rectified electric current induced by irradiating light, a so-called photocurrent, is an established phenomenon in optoelectronic physics. In this paper, we present a comprehensive classification of the photocurrent response arising from the parity violation in bulk systems. We clarify the contrasting role ofTandPTsymmetries and consequently find new types of photocurrent phenomena characteristic of parity-violating magnets—the intrinsic Fermi surface effect and the gyration current. In particular, the gyration current is induced by circularly polarized light, and it is the counterpart of the shift current caused by linearly polarized light. This photocurrent adds a new functionality of materials studied in various fields of condensed matter physics such as multiferroics and spintronics. A list of materials is provided. Furthermore, we show that the gyration current is strongly enhanced by topologically nontrivial band dispersion. On the basis of the microscopic analysis of Dirac models, we demonstrate the divergent photocurrent response and elucidate the importance of the tilting of Dirac cones.
ISSN:2160-3308
2160-3308
DOI:10.1103/PhysRevX.11.011001