Novel understanding for the transitions in the ultra-quantum limit of graphite

ORAL

Abstract

A fascinating transition was documented in the ultra-quantum limit of graphite between 22T and 53T. Recently, another unexpected high-field transition was observed around 75T. The relative simple band structure, though the complicated phase transitions, suggesting more researches should be carried out to understand the mysterious transitions. We performed temperature- and angle-dependent in-plane and out-of-plane magnetoresistance measurements in the ultra-quantum limit on graphite. Our experiments reveal the transition between 22T and 53T is more complicating and interesting than the previous reports. We explain the cause of the transition properly with novel understanding.

*This research performed under the DOE BES ``Science at 100 tesla'' and supported at the NHMFL by NSF Cooperative Agreement No. DMR-1157490. Z. Z acknowledges the supports from LANL ``Director's funding'' and Chinese ``Youth 1000 Talents Plan''

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Authors

  • Zengwei Zhu

    • MS-E536, NHMFL, Los Alamos National Laboratory, Los Alamos, New Mexico 87545

  • Ross McDonald

    • Los ALamos National Laboratory
    • Los Alamos Natl Lab
    • National High Magnetic Field Lab, Los Alamos
    • MS-E536, NHMFL, Los Alamos National Laboratory, Los Alamos, New Mexico 87545

  • Arkady Shekhter

    • National High Magnetic Field Lab, Los Alamos
    • National High Magnetic Field Laboratory, Tallahassee
    • MS-E536, NHMFL, Los Alamos National Laboratory, Los Alamos, New Mexico 87545

  • Brad Ramshaw

    • Los Alamos Natl Lab
    • MS-E536, NHMFL, Los Alamos National Laboratory, Los Alamos, New Mexico 87545

  • Kimberly Modic

    • MS-E536, NHMFL, Los Alamos National Laboratory, Los Alamos, New Mexico 87545

  • Fedor Balakirev

    • NHMFL/LANL
    • Los Alamos Natl Lab
    • MS-E536, NHMFL, Los Alamos National Laboratory, Los Alamos, New Mexico 87545

  • Neil Harrison

    • Los Alamos Natl Lab
    • Los Alamos National Labs
    • MS-E536, NHMFL, Los Alamos National Laboratory, Los Alamos, New Mexico 87545