Thermal probe of correlated states in monolayer graphene

ORAL

Abstract

Thermopower as a sensitive measure of entropy has recently emerged as a powerful tool to probe correlated states in two-dimensional electron systems. In this talk, I will present the first thermopower measurements of fractional quantum Hall (FQH) states in high-quality monolayer graphene. Remarkably, our results reveal the emergence of new even denominator fractional states in higher Landau levels. Furthermore, I will present the temperature and magnetic field-dependent thermopower data to characterize and further prove the robustness of the observed fractional quantum Hall states.

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Presenters

  • Nishat Sultana

    • George Mason University

Authors

  • Nishat Sultana

    • George Mason University

  • Robert William Rienstra

    • George Mason University

  • Kenji Watanabe

    • National Institute for Materials Science
    • Research Center for Functional Materials, National Institute of Materials Science, 1-1 Namiki Tsukuba, Ibaraki 305-0044, Japan

  • Takashi Taniguchi

    • National Institute for Materials Science
    • Research Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • International Center for Materials Nanoarchitectonics, National Institute of Materials Science, 1-1 Namiki Tsukuba, Ibaraki 305-0044, Japan
    • Research Center for Functional Materials, National Institute of Materials Science, 1-1 Namiki Tsukuba, Ibaraki 305-0044, Japan

  • Joseph A Stroscio

    • National Institute of Standards and Technology (NIST)
    • National Institute of Standards and Technology

  • D. E. E Feldman

    • Brown University

  • Fereshte Ghahari

    • George Mason University