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Spin Dynamics and Transport in twisted WSe2 Moire Superlattices

ORAL

Abstract

A series of new unconventional correlated phases have been discovered through charge transport in twisted bilayers of transition metal dichalcogenide semiconductors, such as superconductivity, ferromagnetism and topological phases. Spin transport, on the other hand, can provide distinct information compared with charge transport and may shed light on more elusive phases such as intervalley coherent order. Here we implement an ultrafast MCD imaging technique to study the spin dynamics and transport behavior in tWSe2 moire superlattices, with twist angles ranging from 3.5 to 5 degrees. The ultrafast optical techinique allows us to directly capture the spatio-temporal evolution of the spin signals with micrometer and picosecond resolution. Unusual spin behavior near van Hove singularities will be discussed.

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Presenters

  • Richen Xiong

    University of California, Santa Barbara

Authors

  • Richen Xiong

    University of California, Santa Barbara

  • Yi Guo

    University of California, Santa Barbara

  • Samuel Lew Brantly

    University of California, Santa Barbara

  • Fanzhao Yin

    University of California, Santa Barbara

  • Chenxin Qin

    University of California, Santa Barbara

  • Jinfei Zhou

    University of California, Santa Barbara

  • Zihan Zhang

    University of California, Santa Barbara

  • Taige Wang

    University of California, Berkeley

  • Liang Fu

    Massachusetts Institute of Technology

  • Andrea F Young

    University of California, Santa Barbara, University of California Santa Barbara, University of California at Santa Barbara

  • Chenhao Jin

    University of California, Santa Barbara, Cornell University, University of California at Santa Barbara