Magneto-transport characteristics of a 2D electron system driven to negative magneto-conductivity by microwave photoexcitation

Abstract

Negative diagonal magneto-conductivity/resistivity is a spectacular- and thought provoking- property of driven, far-from-equilibrium, low dimensional electronic systems. The physical response of this exotic electronic state is not yet fully understood since it is rarely encountered in experiment. The microwave-radiation-induced zero-resistance state in the high mobility GaAs/AlGaAs 2D electron system is believed to be an example where negative magneto-conductivity/resistivity is responsible for the observed phenomena. Here, we examine the magneto-transport characteristics of this negative conductivity/resistivity state in the microwave photo-excited two-dimensional electron system (2DES) through a numerical solution of the associated boundary value problem. The results suggest, surprisingly, that a bare negative diagonal conductivity/resistivity state in the 2DES under photo-excitation should yield a positive diagonal resistance with a concomitant sign reversal in the Hall voltage.

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References in corpus (18)

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Cited by in corpus (9)

• Combined study of microwave-power/linear-polarization dependence of the microwave-radiation-induced magnetoresistance oscillations in GaAs/AlGaAs devices
• Comparative study of microwave radiation-induced magnetoresistive oscillations induced by circularly- and linearly- polarized photo-excitation
• Radiation-assisted magnetotransport in two-dimensional electron gas systems: appearance of zero resistance states
• Linear polarization study of microwave-radiation-induced magnetoresistance oscillations: Comparison of power dependence to theory
• Evidence of radiation-driven Landau states in 2D electron systems: magnetoresistance oscillations phase shift
• Evolution of the linear-polarization-angle-dependence of the radiation-induced magnetoresistance-oscillations with microwave power
• Microscopic theory for radiation-induced Zero-Resistance States in 2D electron systems: Franck-Condon blockade
• Linear Response of Zero-Resistance States
• Beating pattern in radiation-induced oscillatory magnetoresistance in 2DES: coupling of plasmon-like and acoustic phonon modes