Temperature effects on microwave-induced resistivity oscillations and zero resistance states in 2D electron systems

TL;DR

This paper presents a microscopic model explaining how temperature and microwave intensity influence resistivity oscillations and zero resistance states in 2D electron systems, emphasizing phonon interactions and electron heating effects.

Contribution

It introduces a novel microscopic model that accounts for temperature-dependent damping and electron heating to explain resistivity behaviors in 2DEG under microwave radiation.

Findings

Resistivity oscillation amplitude decreases with temperature.

Zero resistance states break down at high microwave intensities.

Electron-phonon interactions significantly affect resistivity dynamics.

Abstract

In this work we address theoretically a key issue concerning microwave-induced longitudinal resistivity oscillations and zero resistance states, as is tempoerature. In order to explain the strong temperature dependence of the longitudinal resistivity and the thermally activated transport in 2DEG, we have developed a microscopic model based on the damping suffered by the microwave-driven electronic orbit dynamics by interactions with the lattice ions yielding acoustic phonons. Recent experimental results show a reduction in the amplitude of the longitudinal resistivity oscillations and a breakdown of zero resistance states as the radiation intensity increases. In order to explain it we have included in our model the electron heating due to large microwave intensities and its effect on the longitudinal resistivity.