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Title: Geometric photon-drag effect and nonlinear shift current in centrosymmetric crystals
Authors: Shi, Li-kun
Zhang, Dong
Chang, Kai
Song, Justin Chien Wen
Keywords: Science::Physics
Issue Date: 2021
Source: Shi, L., Zhang, D., Chang, K. & Song, J. C. W. (2021). Geometric photon-drag effect and nonlinear shift current in centrosymmetric crystals. Physical Review Letters, 126(19), 197402-.
Project: NRF-NRFF2016-05
Journal: Physical Review Letters
Abstract: The nonlinear shift current, also known as the bulk photovoltaic current generated by linearly polarized light, has long been known to be absent in crystals with inversion symmetry. Here we argue that a nonzero shift current in centrosymmetric crystals can be activated by a photon-drag effect. Photon-drag shift current proceeds from a "shift current dipole" (a geometric quantity characterizing interband transitions) and manifests a purely transverse response in centrosymmetric crystals. This transverse nature proceeds directly from the shift-vector's pseudovector nature under mirror operation and underscores its intrinsic geometric origin. Photon-drag shift current can be greatly enhanced by coupling to polaritons and provides a new and sensitive tool to interrogate the subtle interband coherences of materials with inversion symmetry previously thought to be inaccessible via photocurrent probes.
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.126.197402
DOI (Related Dataset): 10.21979/N9/BTI9H2
Schools: School of Physical and Mathematical Sciences 
Organisations: Institute of High Performance Computing, A*STAR
Rights: Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Open access publication funded by the Max Planck Society
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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