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Directional interlayer spin-valley transfer in two-dimensional heterostructures

Author

Listed:
  • John R. Schaibley

    (University of Washington)

  • Pasqual Rivera

    (University of Washington)

  • Hongyi Yu

    (University of Hong Kong)

  • Kyle L. Seyler

    (University of Washington)

  • Jiaqiang Yan

    (Oak Ridge National Laboratory
    University of Tennessee)

  • David G. Mandrus

    (Oak Ridge National Laboratory
    University of Tennessee
    University of Tennessee)

  • Takashi Taniguchi

    (Advanced Materials Laboratory, National Institute for Materials Science)

  • Kenji Watanabe

    (Advanced Materials Laboratory, National Institute for Materials Science)

  • Wang Yao

    (University of Hong Kong)

  • Xiaodong Xu

    (University of Washington
    University of Washington)

Abstract

Van der Waals heterostructures formed by two different monolayer semiconductors have emerged as a promising platform for new optoelectronic and spin/valleytronic applications. In addition to its atomically thin nature, a two-dimensional semiconductor heterostructure is distinct from its three-dimensional counterparts due to the unique coupled spin-valley physics of its constituent monolayers. Here, we report the direct observation that an optically generated spin-valley polarization in one monolayer can be transferred between layers of a two-dimensional MoSe2–WSe2 heterostructure. Using non-degenerate optical circular dichroism spectroscopy, we show that charge transfer between two monolayers conserves spin-valley polarization and is only weakly dependent on the twist angle between layers. Our work points to a new spin-valley pumping scheme in nanoscale devices, provides a fundamental understanding of spin-valley transfer across the two-dimensional interface, and shows the potential use of two-dimensional semiconductors as a spin-valley generator in two-dimensional spin/valleytronic devices for storing and processing information.

Suggested Citation

  • John R. Schaibley & Pasqual Rivera & Hongyi Yu & Kyle L. Seyler & Jiaqiang Yan & David G. Mandrus & Takashi Taniguchi & Kenji Watanabe & Wang Yao & Xiaodong Xu, 2016. "Directional interlayer spin-valley transfer in two-dimensional heterostructures," Nature Communications, Nature, vol. 7(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms13747
    DOI: 10.1038/ncomms13747
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    Cited by:

    1. Maciej Da̧browski & Shi Guo & Mara Strungaru & Paul S. Keatley & Freddie Withers & Elton J. G. Santos & Robert J. Hicken, 2022. "All-optical control of spin in a 2D van der Waals magnet," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    2. Fateme Mahdikhanysarvejahany & Daniel N. Shanks & Matthew Klein & Qian Wang & Michael R. Koehler & David G. Mandrus & Takashi Taniguchi & Kenji Watanabe & Oliver L. A. Monti & Brian J. LeRoy & John R., 2022. "Localized interlayer excitons in MoSe2–WSe2 heterostructures without a moiré potential," Nature Communications, Nature, vol. 13(1), pages 1-6, December.

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