Pulsed field studies of Kondo insulator YbB12

ORAL

Abstract

The Shubnikov-de Haas (SdH) effect, quantum oscillations in the electrical conductivity, have been detected in Kondo insulator YbB12 [1]. Sunch an observation suggests a highly exotic ground state in this material. Here we show the results of magnetoresistance and proximity detector oscillator (PDO) measurements in YbB12 in pulsed magnetic fields up to 65 T. SdH oscillations are observed both above and below the field-induced insulator-metal (I-M) transition. An abrupt increase in the oscillation frequency takes place at the transition. A unique angular dependence of the SdH frequencies is also revealed, which is related to the angle-dependent I-M transition field. The origin of the SdH effect in the insulating phase of YbB12 is discussed based on the pulsed field studies.

[1] Z. Xiang, Y. Kasahara, T. Asaba, B. Lawson, C. Tinsman, Lu Chen, K. Sugimoto, S. Kawaguchi, Y. Sato, G. Li, S. Yao, Y. L. Chen, F. Iga, John Singleton, Y. Matsuda, Lu Li, Science, 362, 65 (2018)

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Presenters

  • Ziji Xiang

    Physics, University of Michigan, Department of Physics, University of Michigan, University of Michigan

Authors

  • Ziji Xiang

    Physics, University of Michigan, Department of Physics, University of Michigan, University of Michigan

  • Yuichi Kasahara

    Department of Physics, Kyoto University, Physics, Kyoto University, Kyoto University

  • Tomoya Asaba

    Physics, University of Michigan, MPA-CMMS, Los Alamos National Laboratory, Department of Physics, University of Michigan, University of Michigan, Los Alamos National Laboratory

  • Benjamin Lawson

    University of Michigan

  • Colin Tinsman

    Physics, University of Michigan, Department of Physics, University of Michigan, University of Michigan

  • Lu Chen

    Physics, University of Michigan, Department of Physics, University of Michigan, University of Michigan

  • Yuki Sato

    Physics, Kyoto University, Department of Physics, Kyoto University, Kyoto University

  • Fumitoshi Iga

    Science, Ibaraki University, College of Science, Ibaraki University

  • John Singleton

    National High Magnetic Field Laboratory, Los Alamos National Laboratory, MPA-MAG, Los Alamos National Laboratory, National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, NM 87545, Los Alamos National Laboratory, NHMFL, Los Alamos National Labs, NHMFL, Los Alamos National Laboratory, Los Alamos, National High Magnetic Field Laboratory, NHMFL, Los Alamos Natl Lab, Los Alamos Natl Lab

  • Yuji Matsuda

    Physics, Kyoto University, Department of Physics, Kyoto University, Dept of Physics, Kyoto Univ., Kyoto University

  • Lu Li

    University of Michigan, Physics, University of Michigan, Department of Physics, University of Michigan