Microwave-Induced Magneto-Oscillations and Signatures of Zero-Resistance States in Phonon-Drag Voltage in Two-Dimensional Electron Systems

Abstract

We observe the phonon-drag voltage oscillations correlating with the resistance oscillations under microwave irradiation in a two-dimensional electron gas in perpendicular magnetic field. This phenomenon is explained by the influence of dissipative resistivity modified by microwaves on the phonon-drag voltage perpendicular to the phonon flux. When the lowest-order resistance minima evolve into zero-resistance states, the phonon-drag voltage demonstrates sharp features suggesting that current domains associated with these states can exist in the absence of external dc driving.

Analog of microwave-induced resistance oscillations induced in GaAs heterostructures by terahertz radiation

“…In extremely clean samples the minima of the MIRO develop into ZRS [3][4][5], which are explained [10] in terms of an instability of the system and formation of current domains, occurring when the conductivity becomes negative under MW irradiation (see also [8,11,12]). In spite of numerous experiments and significant advances in their theoretical understanding, there is still no commonly accepted microscopic description of the effect [13,14] and the ongoing MIRO investigations remain challenging [15][16][17][18][19][20][21]. Consequently, new materials have been studied [22][23][24][25] and new theoretical models have been put forward [26][27][28][29][30].…”

“…In spite of numerous experiments and significant advances in their theoretical understanding, there is still no commonly accepted microscopic description of the effect [13,14] and the ongoing MIRO investigations remain challenging [15][16][17][18][19][20][21]. Consequently, new materials have been studied [22][23][24][25] and new theoretical models have been put forward [26][27][28][29][30].…”

Magnetocapacitance oscillations and thermoelectric effect in a two-dimensional electron gas irradiated by microwaves

“…The methods that do not use dc driving are rare exceptions. They include measurements of the photovoltaic response in the samples with builtin spatial variation of electron density near the contacts [14 -16], when the oscillating photovoltage appears as a result of MW irradiation, and thermoelectric measurements [17], when the MW irradiation leads to oscillations of thermoinduced (phonon-drag) voltage. In this paper, we propose and exploit another method, based on capacitance measurements in the samples where the gate covers a central part of the 2D layer.…”

MIRO-like oscillations of magneto-resistivity in GaAs heterostructures induced by THz radiation

“…In spite of numerous experiments and significant advances in their theoretical understanding, there is still no commonly accepted microscopic description of the effect [13,14] and the ongoing MIRO investigations remain challenging [15][16][17][18][19][20]. Consequently new materials have been studied [21][22][23][24] and new theoretical models have been put forward [25][26][27][28][29].…”