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Bloch-Grüneisen nonlinearity of electron transport in GaAs/AlGaAs heterostructures

O. E. Raichev, A. T. Hatke, M. A. Zudov, and J. L. Reno
Phys. Rev. B 96, 081407(R) – Published 22 August 2017
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    Abstract

    We report on nonlinear transport measurements in a two-dimensional electron gas hosted in GaAs/AlGaAs heterostructures. Upon application of direct current, the low-temperature differential resistivity acquires a positive correction, which exhibits a pronounced maximum followed by a plateau. With increasing temperature, the nonlinearity diminishes and disappears. These observations can be understood in terms of a crossover from the Bloch-Grüneisen regime to the quasielastic scattering regime as the electrons are heated by direct current. Calculations considering the interaction of electrons with acoustic phonons provide a reasonable description of our experimental findings.

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    • Received 26 June 2017

    DOI:https://doi.org/10.1103/PhysRevB.96.081407

    ©2017 American Physical Society

    Physics Subject Headings (PhySH)

    1. Research Areas
    Acoustic phononsElectrical conductivity
    1. Physical Systems
    III-V semiconductorsTwo-dimensional electron gas
    1. Techniques
    Hall bar
    Condensed Matter, Materials & Applied Physics

    Authors & Affiliations

    O. E. Raichev1, A. T. Hatke2,*, M. A. Zudov3,†, and J. L. Reno4

    • 1Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, Prospekt Nauki 41, 03028 Kiev, Ukraine
    • 2National High Magnetic Field Laboratory, Tallahassee, Florida 32310, USA
    • 3School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
    • 4CINT, Sandia National Laboratories, Albuquerque, New Mexico 87185, USA

    • *Present address: Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA.
    • †Corresponding author: zudov@physics.umn.edu

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    Issue

    Vol. 96, Iss. 8 — 15 August 2017

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