Study of hysteretic magnetotransport of SmB6 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.

–

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