Abstract
We report the observation of dc-current-bias-induced B-periodic Hall resistance oscillations and Hall plateaus in the GaAs/AlGaAs 2D system under combined microwave radiation- and dc bias excitation at liquid helium temperatures. The Hall resistance oscillations and plateaus appear together with concomitant oscillations also in the diagonal magnetoresistance. The periods of Hall and diagonal resistance oscillations are nearly identical, and source power (P) dependent measurements demonstrate sub-linear relationship of the oscillation amplitude with P over the span 0 < P ≤ 20 mW.
Highlights
Is the effective mass, and for the GaAs/AlGaAs 2DES, The application of a transverse magnetic field leads to a εeff =/2, with hybridization of cyclotron resonance with this plasmon, producing the magnetoplasmon which follows ωm2p = ωp2 + ωC254
In a strip or Hall bar geometry, the length scale established by the boundary helps to determine the quantization condition or allowed values for the plasmon wavevector, k
Vasiliadou et al investigated the transport signature of this phenomenon in Hall bars and found that their data could be described by k = π/W, where W is the width of the device[55]
Summary
Magnetotransport studies of two-dimensional electron systems (2DES) subjected to microwave, mm-wave, and terahertz photoexcitation have revealed many interesting phenomena including the radiation-induced zero-resistance states and associated radiation-induced magnetoresistance oscillations, which have drawn attention from both experiment and theory[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48] It is well-known that the above mentioned radiation-induced magnetotransport effect consists of 1/4-cycle phase-shifted 1/B-periodic oscillations, where the oscillatory minima emerge in the vicinity of B = [4/(4j + 1)]Bf, where Bf = 2πfm*/e, f is the microwave frequency, m* is the effective electron mass and j = 1, 2, 3. The necessity of a supplemental dc-current for the observability of this effect suggests a role for heating in this observed 2DES effect
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