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  Light-Driven Extremely Nonlinear Bulk Photogalvanic Currents

Neufeld, O., Tancogne-Dejean, N., de Giovannini, U., Hübener, H., & Rubio, A. (2021). Light-Driven Extremely Nonlinear Bulk Photogalvanic Currents. Physical Review Letters, 127(12): 126601. doi:10.1103/PhysRevLett.127.126601.

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PhysRevLett.127.126601.pdf (Publisher version), 564KB
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Open Access. - 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.
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Supplemental Material: Supplemental material is available for this paper that includes details on the methodology used in calculations as well as some additional results.
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https://arxiv.org/abs/2105.09084 (Preprint)
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 Creators:
Neufeld, O.1, 2, Author              
Tancogne-Dejean, N.1, 2, Author              
de Giovannini, U.1, 2, 3, 4, Author              
Hübener, H.1, 2, Author              
Rubio, A.1, 2, 4, 5, Author              
Affiliations:
1Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
2Center for Free-Electron Laser Science, ou_persistent22              
3IKERBASQUE, Basque Foundation for Science, ou_persistent22              
4Nano-Bio Spectroscopy Group, Universidad del País Vasco UPV/EHU, ou_persistent22              
5Center for Computational Quantum Physics (CCQ), The Flatiron Institute, ou_persistent22              

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 Abstract: We predict the generation of bulk photocurrents in materials driven by bichromatic fields that are circularly polarized and corotating. The nonlinear photocurrents have a fully controllable directionality and amplitude without requiring carrier-envelope-phase stabilization or few-cycle pulses, and can be generated with photon energies much smaller than the band gap (reducing heating in the photoconversion process). We demonstrate with ab initio calculations that the photocurrent generation mechanism is universal and arises in gaped materials (Si, diamond, MgO, hBN), in semimetals (graphene), and in two- and three-dimensional systems. Photocurrents are shown to rely on sub-laser-cycle asymmetries in the nonlinear response that build-up coherently from cycle to cycle as the conduction band is populated. Importantly, the photocurrents are always transverse to the major axis of the co-circular lasers regardless of the material’s structure and orientation (analogously to a Hall current), which we find originates from a generalized time-reversal symmetry in the driven system. At high laser powers (∼1013  W/cm2) this symmetry can be spontaneously broken by vast electronic excitations, which is accompanied by an onset of carrier-envelope-phase sensitivity and ultrafast many-body effects. Our results are directly applicable for efficient light-driven control of electronics, and for enhancing sub-band-gap bulk photogalvanic effects.

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Language(s): eng - English
 Dates: 2021-05-022021-07-282021-09-132021-09-17
 Publication Status: Published in print
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 Rev. Type: Peer
 Identifiers: arXiv: 2105.09084
DOI: 10.1103/PhysRevLett.127.126601
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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 127 (12) Sequence Number: 126601 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1