Surface Acoustic Wave Study in Microwave-Induced Non-Equilibrium Electron System

ORAL

Abstract

Microwave-induced resistance oscillations (MIRO) and zero-resistance states (ZRS) occur under microwave irradiation in the ultrahigh mobility two-dimensional electron gas (2DEG) in GaAs/AlGaAs quantum wells (QW). We employed the surface acoustic wave (SAW) to study the structure of MIRO and ZRS. We observe that the velocity shift (Δv/v) shows minima at the peak resistance regime (j ≡ ω/ωC ~ 1, 2, 3, etc). And in the ZRS regime, an increase of the velocity shift appears at j = 5/4. The results conform to the theoretical and experimental studies of current domains at ZRS under high power microwave.

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Presenters

  • Chi Zhang

    SKLSM, Institute of semiconductors, Chinese Academy of Sicence

Authors

  • Jianli Wang

    International Center for Quantum Materials, Peking University

  • Chi Zhang

    SKLSM, Institute of semiconductors, Chinese Academy of Sicence

  • Loren Pfeiffer

    Electrical Engineering, Princeton University, Princeton University, Princeton Univ, Department of Electrical Engineering, Princeton University, PRISM, Princeton University, Physics, Princeton University, Electrical Engineering, Princeton

  • Kenneth West

    Electrical Engineering, Princeton University, Princeton University, Princeton Univ, Department of Electrical Engineering, Princeton University, PRISM, Princeton University, Physics, University of Pittsburgh, Electrical Engineering, Princeton

  • K. W. Baldwin

    Electrical Engineering, Princeton University, Princeton University