Biexcitons in Monolayer Transition Metal Dichalcogenides Tuned by Magnetic Fields

ORAL

Abstract

Time-Integrated Four Wave Mixing measurements were performed on CVD grown MoSe2 monolayers. The dephasing lifetime was investigated in magnetic fields up to 25T. Additionally, the effects of valley selection on the lifetime was explored through varying polarization schemes. The results were then modeled using time-dependent density function theory revealed the dephasing lifetime is dominated by the inter-valley biexcitons.

*The research at USF and UAB is supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award DESC0012635. This work was in part supported by the National Science Foundation under Grant no. DMR-1409473. A portion of this work was performed at the National High Magnetic Field Laboratory, which is supported by National Science Foundation Cooperative Agreement no. DMR-1157490 and the State of Florida. S.M. acknowledges funding through NSF DMR-1229217. H.R.G acknowledges support from the National Science Foundation (NSF) grant DMR-1557434. V.T. acknowledges the Department of Energy for partial support under Grant no. DOE-DE-FG02-07ER46345.

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Presenters

  • Varun Mapara

    • Dept. of Physics, University of South Florida

Authors

  • Christopher E Stevens

    • Dept. of Physics, University of South Florida
    • Department of Physics, University of South Florida

  • Varun Mapara

    • Dept. of Physics, University of South Florida

  • Jagannath Paul

    • Dept. of Physics, University of South Florida

  • Timonthy Cox

    • Dept. of Physics, University of South Florida

  • Prasana Sahoo

    • University of South Florida
    • Dept. of Physics, University of South Florida

  • Humberto Rodriguez Gutierrez

    • Department of Physics, University of South Florida
    • Dept. of Physics, University of South Florida
    • Physics, University of South Florida

  • Volodymyr Turkowski

    • Physics, University of Central Florida, Orlando, 32816 FL
    • Dept. of Physics, University of Central Florida
    • Physics, University of Central Florida
    • University of Central Florida

  • Dimitry Semenov

    • National High Magnetic Field Laboratory, Florida State University

  • Stephen A McGill

    • National High Magnetic Field Laboratory, Florida State University
    • NHMFL, Florida State University
    • Florida State/NHMFL
    • National High Magnetic Field Laboratory

  • Myron Kapetanakis

    • Dept. of Physics, University of Alabama at Birmingham
    • Dept. of Physics, University of Alabama Birmingham
    • Physics, University of Alabama at Birmingham

  • Ilias Perakis

    • Dept. of Physics, University of Alabama at Birmingham
    • Dept. of Physics, University of Alabama Birmingham
    • Physics, University of Alabama at Birmingham

  • David J. Hilton

    • Dept. of Physics, University of Alabama Birmingham
    • Physics, University of Alabama at Birmingham

  • Denis Karaiskaj

    • Dept. of Physics, University of South Florida
    • Department of Physics, University of South Florida