Magnetic proximity effect in a WSe2/YIG heterostructure

ORAL

Abstract

Magnetic proximity effect between atomically thin semiconductors and magnetic thin film layers has gained significant attention due to its ability to manipulate spin and valley degrees of freedom without the need for a strong external magnetic field. Here, we present magneto-photoluminescence experiments on a WSe2 monolayer placed on an epitaxially grown yttrium iron garnet (YIG) thin film. New exciton resonances and energy shifts are observed upon saturation of the YIG layer with a small magnetic field on the order of ∼100 Oe. Furthermore, we compare the proximity effect when the WSe2 monolayer is encapsulated with hBN. Our findings suggest an effective approach to controlling spin and valley in atomically thin materials using common magnetic films and substrates.

* We gratefully acknowledge funding from the National Science Foundation via EPM DMR-2019130, MRSEC DMR-2308817, and Air Force Office of Scientific Research under award number FA2386-21-1-4067.

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Presenters

  • Xiangcheng Liu

    The University of Texas at Austin

Authors

  • Xiangcheng Liu

    The University of Texas at Austin

  • Zhida Liu

    University of Texas at austin, University of Texas at Austin

  • Daniel Russell

    Ohio State University

  • Saba Arash

    The University of Texas at Austin

  • Jeongheon Choe

    Columbia University, The University of Texas at Austin

  • Kenji Watanabe

    National Institute for Materials Science, NIMS, Research Center for Electronic and Optical Materials, National Institute for Materials Science, Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan, National Institute for Material Science

  • Takashi Taniguchi

    Kyoto Univ, National Institute for Materials Science, Research Center for Materials Nanoarchitectonics, Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, National Institute for Materials Sciences, NIMS, International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan, National Institute for Material Science, International Center for Materials Nanoarchitectonics, NIMS, Japan, International Center for Materials Nanoarchitectonics, Tsukuba, National Institue for Materials Science, Kyoto University, National Institute of Materials Science, International Center for Materials Nanoarchitectonics and National Institute for Materials Science

  • Shangfan Lee

    Academia Sinica, Inst of Physics Academia Sinica, Institute of Physics, Academia Sinica

  • Fengyuan Yang

    Ohio State University, Ohio State University, Department of Physics

  • Xiaoqin Elaine Li

    University of Texas at Austin, The University of Texas at Austin