Observation of a Thermoelectric Hall Plateau in the Extreme Quantum Limit

ORAL

Abstract

The thermoelectric Hall effect is the generation of a transverse heat current upon applying an electric field in the presence of a magnetic field. Here we demonstrate that the thermoelectric Hall conductivity αxy in the three-dimensional Dirac semimetal ZrTe5 acquires a robust plateau in the extreme quantum limit of magnetic field. The plateau value is independent of the field strength, disorder strength, carrier concentration, or carrier sign. We explain this plateau theoretically and show that it is a unique signature of three-dimensional Dirac or Weyl electrons in the extreme quantum limit. We further find that other thermoelectric coefficients, such as the thermopower and Nernst coefficient, are greatly enhanced over their zero-field values even at relatively low fields.

*National Key Basic Research Program of China (No. 2016YFA0300600) and NSFC (No. 11574005, No. 11774009). Guangdong Innovative and Entrepreneurial Research Team Program (No. 2016ZT06D348), NFSC (11874193) and Shenzhen Fundamental subject research Program (JCYJ20170817110751776) and Innovation Commission of Shenzhen Municipality (Grant No. KQTD2016022619565991). DOE Office of Basic Energy Sciences Award DE-SC0018945. NSF STC No. DMR-1231319. U.S. Department of Energy under Contract No. DE-SC0012704.

Presenters

  • Wenjie Zhang

    • Peking Univ

Authors

  • Wenjie Zhang

    • Peking Univ

  • Peipei Wang

    • Southern University of Science and Technology of China
    • Southern University of Science and Technology

  • Brian Skinner

    • Ohio State University
    • Ohio State Univ - Columbus

  • Ran Bi

    • Peking Univ
    • Peking University

  • Vladyslav Kozii

    • Massachusetts Institute of Technology

  • Chang-woo Cho

    • Southern University of Science and Technology of China
    • Southern University of Science and Technology

  • Ruidan Zhong

    • Brookhaven National Laboratory
    • Princeton University

  • John Schneeloch

    • Brookhaven National Laboratory
    • Univ of Virginia
    • University of Virginia
    • Brookhaven National Lab

  • Dapeng Yu

    • Southern University of Science and Technology of China
    • Southern University of Science and Technology
    • South University of Science and Technology of China
    • Shenzhen Key Laboratory of Quantum Science and Engineering, and Department of Physics, South University of Science and Technology

  • Genda Gu

    • Brookhaven National Laboratory
    • Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory
    • Brookhaven national lab
    • Condensed Matter Physics and Materials Science, Brookhaven National Laboratory
    • Brookhaven National Lab
    • Condensed Matter Physics and Material Science, Brookhaven National Laboratory, Upton, NY, United States
    • Brookhaven National Laboratories
    • Condensed Matter Physics and Material Science Division, Brookhaven National Laboratory

  • Liang Fu

    • Massachusetts Institute of Technology
    • Massachusetts Institute of Technology MIT
    • Department of Physics, Massachusetts Institute of Technology MIT
    • Physics, MIT
    • Physics, Massachusetts Institute of Technology
    • MIT

  • Xiaosong Wu

    • Peking Univ
    • Peking University
    • School of Physics, Peking Univerisity

  • Liyuan Zhang

    • Southern University of Science and Technology of China
    • Southern University of Science and Technology