Study of current bias induced carrier heating effect in the regime of Shubnikov de Haas oscillations in high mobility GaAs/AlxGaAs1-x two-dimensional electron system

ORAL

Abstract

In a current carrying metallic system, temperature of the carriers depends on Joule heating and energy relaxation through electron diffusion or electron-phonon coupling [01, 02, 03]. In this study, carrier heating induced by ac bias current in high mobility GaAs/AlxGaAs1-x two-dimensional electron system at temperature range of 1.6 ≤ T ≤ 4.2 K was investigated using alteration in the line shape of Shubnikov de Haas oscillations. Haas oscillation was analyzed, and fit base on Lifshitz-Kosevich theory and extracted carrier temperatures indicate that the electron diffusion predominant in the energy relaxation process of the system and the 2DES is in a quasi-equilibrium state where the hot electron situation is attained.

[01] Zhenbing Tan, Changling Tan, Li Ma, G. T. Liu, L. Lu, and C. L. Yang, Phys. Rev. B 84, 115429 (2011).
[02] X. L. Lei, and S. Y. Liu, Phys. Rev. B 72, 075345 (2005).
[03] J. K. Viljas, and T. T. Heikkilä, Phys. Rev. B 81, 245404 (2010).

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Presenters

  • Chathuranga Munasinghe

    Physics and Astronomy , Georgia State University, Physics and Astronomy, Georgia State University, 25 Park Place, #605, Georgia State University

Authors

  • Chathuranga Munasinghe

    Physics and Astronomy , Georgia State University, Physics and Astronomy, Georgia State University, 25 Park Place, #605, Georgia State University

  • Binuka Gunawardana

    Physics & Astronomy , Georgia State University, Georgia State Univ, Physics and Astronomy , Georgia State University, Department of Physics, Georgia State University, Physics and Astronomy, Georgia State University, 25 Park Place, #605, Georgia State University

  • R.L. Samaraweera

    Physics and Astronomy , Georgia State University, Physics and Astronomy, Georgia State University, 25 Park Place, #605, Georgia State University, Dept. of Physics and Astronomy, Georgia State Univ

  • Tharanga Nanayakkara

    Physics & Astronomy , Georgia State University, Physics & Astronomy, Georgia State University, Georgia State Univ, Physics and Astronomy , Georgia State University, Department of Physics, Georgia State University

  • Zhuo Wang

    Physics and Astronomy , Georgia State University

  • Annika Kriisa

    Physics & Astronomy , Georgia State University, Physics & Astronomy, Georgia State University, Georgia State Univ, Physics and Astronomy , Georgia State University, Department of Physics, Georgia State University, Physics and Astronomy, Georgia State University, 25 Park Place, #605, Georgia State University, Dept. of Physics and Astronomy, Georgia State Univ

  • U. Kushan Wijewardena

    Physics & Astronomy , Georgia State University, Physics & Astronomy, Georgia State University, Physics and Astronomy , Georgia State University, Physics and Astronomy, Georgia State University, 25 Park Place, #605, Georgia State University

  • Christian Reichl

    ETH - Zurich, Solid State Physics Laboratory, ETH Zurich, ETH Zurich, Physics, ETH Zurich, Department of Physics, ETH Zurich, Laboratory for Solid State Physics, ETH Zürich, Laboratorium fur Festkorperphysik, , ETH-Zurich, Laboratorium für Festkörperphysik, ETH Zürich

  • Werner Wegscheider

    ETH - Zurich, Solid State Physics Laboratory, ETH Zurich, ETH Zurich, Physics, ETH Zurich, Department of Physics, ETH Zurich, Laboratory for Solid State Physics, ETH Zürich, Laboratorium fur Festkrperphysik, ETH-Zurich, Laboratorium fur Festkorperphysik, , ETH-Zurich, ETH Zürich, Laboratorium für Festkörperphysik, ETH Zürich, Laboratorium fur Festkorperphysik, ETH-Zurich

  • Ramesh Mani

    Physics & Astronomy , Georgia State University, Physics & Astronomy, Georgia State University, Georgia State Univ, Physics and Astronomy , Georgia State University, Department of Physics, Georgia State University, Physics and Astronomy, Georgia State University, 25 Park Place, #605, Georgia State University, Dept. of Physics and Astronomy, Georgia State Univ, Georgia State University