Study of hysteretic magnetotransport of SmB<sub>6 </sub>using local and non-local Corbino disk techniques.

ORAL

Abstract

Recent experiments that have been reported during the past several years suggest that samarium hexaboride (SmB6) is a true topological Kondo insulator (TKI). Particularly, the hysteretic magnetotransport at low temperatures is a remarkable feature that seems to be consistent with the TKI picture, but distinct from other topological insulators. Motivated by the growing interest in the role of disorder and impurities in bulk SmB6, we revisit the surface transport, including the hysteresis features, using Corbino disk structures on flux- and floating zone-grown samples with small impurity concentrations (e.g., Gd, Ni, and Fe). Also, using bulk probing techniques such as non-local (inverted) Corbino transport and heat capacity, we investigate if the bulk channel has an influence on the hysteresis signals we observe in standard transport configurations.

*The work at IQM supported as part of the Institute for Quantum Matter, an
Energy Frontier Research Center funded by the U.S. Department of Energy,
Office of Science, Office of Basic Energy Sciences under Award Number
DE-SC0019331.

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Presenters

  • Yun Suk Eo

    • Department of Physics, University of Maryland, College Park
    • University of Maryland, College Park

Authors

  • Yun Suk Eo

    • Department of Physics, University of Maryland, College Park
    • University of Maryland, College Park

  • Tristin E Metz

    • University of Maryland, College Park
    • Department of Physics, University of Maryland, College Park

  • Hyunsoo Kim

    • University of Maryland, College Park
    • Department of Physics, University of Maryland, College Park

  • Wesley T. Fuhrman

    • Schmidt Science Fellows, in partnership with the Rhodes Trust

  • Shanta Saha

    • Physics, University of Maryland
    • Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland
    • University of Maryland, College Park & NIST
    • Department of Physics, University of Maryland, College Park
    • University of Maryland
    • University of Maryland - College Park

  • Xiangfeng Wang

    • Department of Physics, University of Maryland, College Park
    • University of Maryland

  • Juan Chamorro

    • Institute for Quantum Matter, Johns Hopkins University
    • Department of Chemistry, Johns Hopkins University

  • Seyed Koohpayeh

    • Johns Hopkins
    • Johns Hopkins University
    • Institute for Quantum Matter, Johns Hopkins University
    • Henry A. Rowland Department of Physics and Astronomy, Johns Hopkins University

  • Tyrel McQueen

    • Johns Hopkins University
    • Johns Hopkins Univ
    • Institute for Quantum Matter, Johns Hopkins University
    • Henry A. Rowland Department of Physics and Astronomy, Johns Hopkins University

  • Michael Fuhrer

    • Department of Physics and Astronomy and Centre for Future Low Energy Electronics Technologies, Monash University
    • Physics and Astronomy, Monash Univ
    • School of Physics & Astronomy, Monash University
    • ARC Centre of Excellence in Future Low-Energy Electronics Technologies

  • Johnpierre Paglione

    • Physics, University of Maryland
    • University of Maryland, College Park
    • Center for Nanophysics and Advanced Materials, University of Maryland College Park
    • Center for Nanophysics and Advance Materials, University of Maryland, College Park, MD
    • University of Maryland, College Park & NIST
    • Department of Physics, University of Maryland, College Park
    • University of Maryland
    • University of Maryland - College Park