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