Long-distance spin transport in indirect excitons in MoSe2/WSe2 heterostructure

ORAL

Abstract

We studied spatially indirect excitons (IXs), also known as interlayer excitons, in van der Waals heterostructures composed of atomically thin layers of transition-metal dichalcogenides (TMD). In the IX system, we observed the long-distance spin transport with the decay distances exceeding 100 microns and diverging so spin currents show no decay in the HS. With increasing IX density, we observed spin localization, then long-distance spin transport, and then reentrant spin localization, in agreement with the Bose-Hubbard theory prediction for superfluid and insulating phases in periodic potentials due to moire superlattices.

* The measurements of spin transport were supported by DOE Office of Basic Energy Sciences under Award No. DE-FG02-07ER46449. The TMD heterostructure fabrication was supported by NSF Grant No. 1905478.

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Presenters

  • Zhiwen Zhou

    UC San Diego, University of California, San Diego

Authors

  • Zhiwen Zhou

    UC San Diego, University of California, San Diego

  • Erik A Szwed

    University of California, San Diego

  • Darius J Choksy

    University of California San Diego, University of California, San Diego

  • Lewis Fowler-Gerace

    University of California, San Diego

  • Leonid V Butov

    University of California, San Diego