Self-Channelling of Electric Current in a Quantum Well

TL;DR

This paper demonstrates that homogeneous photoexcitation in an asymmetric InAs quantum well under a tilted magnetic field induces multiple in-plane electric currents flowing simultaneously in different directions, revealing a novel self-channelling phenomenon.

Contribution

It introduces the concept of self-channelling of electric current in quantum wells and provides a theoretical model explaining the observed effect.

Findings

Multiple in-plane currents flow simultaneously with different magnitudes.

Currents can flow in opposite directions under uniform excitation.

The effect occurs in asymmetric quantum wells under Landau quantization.

Abstract

We have directly demonstrated that homogeneous photoexcitation of a quantum well in presence of uniform tilted magnetic field gives rise to a set of bypass in-plane electric currents of a different value which may flow even in the opposite directions simultaneously. The effect has been observed in an asymmetric InAs quantum well under the Landau quantization. Theoretical model of the effect are discussed as well as the related problems.