Magnetoresistance and Torque Magnetization of YbB<sub>12</sub> in Pulsed Magnetic Fields

ORAL

Abstract

The observation of magnetic quantum oscillations in nominally insulating SmB6 generated significant excitement due to its implications for the presence of topological surface states or a bulk neutral Fermi surface. More recently, similar oscillations have been reported in another Kondo insulator YbB12. There are currently numerous open questions regarding the nature of these oscillations including the relative contributions of the bulk, surfaces, and defects, as well as the presence of multiple oscillation frequencies. We present a pulsed magnetic field study of magnetoresistance and torque magnetization in YbB12. The angular and temperature dependences of these measurements provide important insights into the electronic structure of YbB12 and suggest a connection between the insulating phase oscillations and the field-induced insulator-metal transition.

*The high-magnetic field work was supported by the U.S. Department of Energy "Science of 100T" BES program and the Los Alamos National Laboratory LDRD program, project number 20210320ER. The work at JHU was 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, Basic Energy Sciences under Award No. DE-SC0019331. The work at JHU benefited from equipment provided in the PARADIM Bulk Materials Facility, as part of the Materials for Innovation Platform Program, which is supported by the National Science Foundation (Grant DMR-1539918).

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Presenters

  • Christopher A Mizzi

    • Los Alamos National Laboratory

Authors

  • Christopher A Mizzi

    • Los Alamos National Laboratory

  • Neil Harrison

    • Los Alamos Natl Lab
    • National High Magnetic Field Laboratory, Los Alamos, New Mexico 87545, U.S.A.

  • William A Phelan

    • Los Alamos National Laboratory

  • Lucas A Pressley

    • Johns Hopkins University

  • Tyrel M McQueen

    • Johns Hopkins University
    • Department of Chemistry, The Johns Hopkins University

  • Priscila Rosa

    • Quantum Group, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
    • Los Alamos National Laboratory

  • Mun K Chan

    • Los Alamos National Laboratory