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arXiv · 1708.08498

Low-Frequency Microwave Induced Quantum Oscillations in A Two-Dimensional Electron System

Jian Mi·Huiying Liu·Junren Shi·L. N. Pfeiffer·K. W. West·K. W. Baldwin·Chi Zhang
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Abstract

We study the magnetoresistance of an ultrahigh mobility GaAs/AlGaAs two-dimensional electron sample in a weak magnetic field under low-frequency (f < 20 GHz) microwave (MW) irradiation. We observe that with decreasing MW frequency, microwave induced resistance oscillations (MIRO) damp and multi-photon processes become dominant. At very low MW frequency (f < 4 GHz), MIRO disappears gradually and a new SdH-like oscillation develops. The analysis indicates that the new oscillation may originate from alternating Hall-field induced resistance oscillations (ac-HIRO), or can be viewed as a multi-photon process of MIRO in low MW frequency limit. Our findings bridge the non-equilibrium states of MIRO and HIRO, which can be brought into a frame of quantum tunneling junction model.

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Jian Mi, Huiying Liu, Junren Shi, L. N. Pfeiffer, K. W. West, K. W. Baldwin, Chi Zhang. 2017-08-28. Low-Frequency Microwave Induced Quantum Oscillations in A Two-Dimensional Electron System. https://doi.org/10.1103/physrevb.100.235437

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