Light-induced bound electron states in two-dimensional systems: Contribution to electron transport

TL;DR

This paper explores how off-resonant circularly polarized light creates bound electron states in 2D systems, affecting electron transport by inducing resonant scattering and quantum conductivity corrections.

Contribution

It introduces a theoretical framework for understanding light-induced bound states and their impact on transport properties in 2D electron systems.

Findings

Light induces quasi-stationary bound states in 2D systems.

Resonant scattering affects electron transport.

Quantum correction to conductivity is observed.

Abstract

In two-dimensional (2D) electron systems, an off-resonant high-frequency circularly polarized electromagnetic field can induce the quasi-stationary bound electron states of repulsive scatterers. As a consequence, the resonant scattering of conduction electrons through the quasi-stationary states and the capture of conduction electrons by the states appear. The present theory describes the transport properties of 2D electron gas irradiated by a circularly polarized light, which are modified by these processes. Particularly, it is demonstrated that irradiation of 2D electron systems by the off-resonant field results in the quantum correction to conductivity of resonant kind.