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Optical manipulation of Rashba-split 2-dimensional electron gas

Author

Listed:
  • M. Michiardi

    (Quantum Matter Institute, University of British Columbia
    University of British Columbia
    Max Planck Institute for Chemical Physics of Solids)

  • F. Boschini

    (Quantum Matter Institute, University of British Columbia
    University of British Columbia
    Centre Énergie Matériaux Télécommunications, Institut National de la Recherche Scientifique)

  • H.-H. Kung

    (Quantum Matter Institute, University of British Columbia
    University of British Columbia)

  • M. X. Na

    (Quantum Matter Institute, University of British Columbia
    University of British Columbia)

  • S. K. Y. Dufresne

    (Quantum Matter Institute, University of British Columbia
    University of British Columbia)

  • A. Currie

    (Quantum Matter Institute, University of British Columbia
    University of British Columbia)

  • G. Levy

    (Quantum Matter Institute, University of British Columbia
    University of British Columbia)

  • S. Zhdanovich

    (Quantum Matter Institute, University of British Columbia
    University of British Columbia)

  • A. K. Mills

    (Quantum Matter Institute, University of British Columbia
    University of British Columbia)

  • D. J. Jones

    (Quantum Matter Institute, University of British Columbia
    University of British Columbia)

  • J. L. Mi

    (Aarhus University)

  • B. B. Iversen

    (Aarhus University)

  • Ph. Hofmann

    (Interdisciplinary Nanoscience Center, Aarhus University)

  • A. Damascelli

    (Quantum Matter Institute, University of British Columbia
    University of British Columbia)

Abstract

In spintronics, the two main approaches to actively control the electrons’ spin involve static magnetic or electric fields. An alternative avenue relies on the use of optical fields to generate spin currents, which can bolster spin-device performance, allowing for faster and more efficient logic. To date, research has mainly focused on the optical injection of spin currents through the photogalvanic effect, and little is known about the direct optical control of the intrinsic spin-splitting. To explore the optical manipulation of a material’s spin properties, we consider the Rashba effect. Using time- and angle-resolved photoemission spectroscopy (TR-ARPES), we demonstrate that an optical excitation can tune the Rashba-induced spin splitting of a two-dimensional electron gas at the surface of Bi2Se3. We establish that light-induced photovoltage and charge carrier redistribution - which in concert modulate the Rashba spin-orbit coupling strength on a sub-picosecond timescale - can offer an unprecedented platform for achieving optically-driven spin logic devices.

Suggested Citation

  • M. Michiardi & F. Boschini & H.-H. Kung & M. X. Na & S. K. Y. Dufresne & A. Currie & G. Levy & S. Zhdanovich & A. K. Mills & D. J. Jones & J. L. Mi & B. B. Iversen & Ph. Hofmann & A. Damascelli, 2022. "Optical manipulation of Rashba-split 2-dimensional electron gas," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
  • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-30742-5
    DOI: 10.1038/s41467-022-30742-5
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    References listed on IDEAS

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    1. M.S. Bahramy & P.D.C King & A. de la Torre & J. Chang & M. Shi & L. Patthey & G. Balakrishnan & Ph. Hofmann & R. Arita & N. Nagaosa & F. Baumberger, 2012. "Emergent quantum confinement at topological insulator surfaces," Nature Communications, Nature, vol. 3(1), pages 1-7, January.
    2. Xiaojie Liu & Ashish Chanana & Uyen Huynh & Fei Xue & Paul Haney & Steve Blair & Xiaomei Jiang & Z. V. Vardeny, 2020. "Circular photogalvanic spectroscopy of Rashba splitting in 2D hybrid organic–inorganic perovskite multiple quantum wells," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
    3. Anjan Soumyanarayanan & Nicolas Reyren & Albert Fert & Christos Panagopoulos, 2016. "Emergent phenomena induced by spin–orbit coupling at surfaces and interfaces," Nature, Nature, vol. 539(7630), pages 509-517, November.
    4. Marco Bianchi & Dandan Guan & Shining Bao & Jianli Mi & Bo Brummerstedt Iversen & Philip D.C. King & Philip Hofmann, 2010. "Coexistence of the topological state and a two-dimensional electron gas on the surface of Bi2Se3," Nature Communications, Nature, vol. 1(1), pages 1-5, December.
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    Cited by:

    1. Geoffroy Kremer & Julian Maklar & Laurent Nicolaï & Christopher W. Nicholson & Changming Yue & Caio Silva & Philipp Werner & J. Hugo Dil & Juraj Krempaský & Gunther Springholz & Ralph Ernstorfer & Jan, 2022. "Field-induced ultrafast modulation of Rashba coupling at room temperature in ferroelectric α-GeTe(111)," Nature Communications, Nature, vol. 13(1), pages 1-6, December.
    2. B. Arnoldi & S. L. Zachritz & S. Hedwig & M. Aeschlimann & O. L. A. Monti & B. Stadtmüller, 2024. "Revealing hidden spin polarization in centrosymmetric van der Waals materials on ultrafast timescales," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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