Thermopower and Electrical Transport in Ag<sub>2-δ</sub>Te under Magnetic Field

ORAL

Abstract

We investigate the magnetotransport and thermopower properties in a series of the silver deficient semiconductors Ag2-δTe (δ = 0, 2×10-4, and 7×10-4). We find that the non-trivial field dependences of both the longitudinal and transverse thermoelectric coefficients are sufficiently described by simple expressions that are parameterized with the tangent of the hall angle, defined as tan θH ≡ ρxy/ρxx. While our model is based on the semiclassical transport theory for a single band, it captures intertwined transport characteristics in an explicit manner. We expect our model to have broad applicability in understanding thermoelectric responses as well as electrical transport under high magnetic field in other semimetals and semiconductors.

** This work is supported by the NSF under grant no. DMR-2001376. A portion of this work was performed at the National High Magnetic Field Laboratory which is supported by the National Science Foundation Cooperative Agreement No. DMR-1644779 and the State of Florida.

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Presenters

  • Ian Leahy

    • Department of Physics, University of Colorado, Boulder
    • University of Colorado, Boulder

Authors

  • Ian Leahy

    • Department of Physics, University of Colorado, Boulder
    • University of Colorado, Boulder

  • Peter Siegfried

    • Department of Physics, University of Colorado, Boulder
    • Physics and Astronomy, George Mason University
    • Physics, George Mason University

  • Harold Schnyders

    • Department of Physics, Grand Valley State University

  • Anke Husmann

    • Department of Materials Science and Metallurgy, University of Cambridge

  • Minhyea Lee

    • University of Colorado, Boulder
    • Department of Physics, University of Colorado, Boulder