Transport in two-dimensional electron gas narrow channel with a magnetic field gradient

TL;DR

This study explores how a magnetic field gradient affects electron transport in a 2D electron gas narrow channel, revealing phenomena like snake orbits that enhance conductivity and enable rectification.

Contribution

It demonstrates the impact of magnetic field gradients on transport phenomena in 2DEG channels, highlighting the role of snake orbits in conductivity and rectification effects.

Findings

Snake orbits propagate according to field gradient sign

Conductivity is enhanced by snake orbits

Rectification effect depends on DC bias direction

Abstract

We have investigated distinctive transport phenomena in two-dimensional electron gas (2DEG) narrow channel subjected to a large magnetic field gradient, a unique situation created in a ferromagnet/2DEG hybrid structure. The so-called snake orbits which propagate in the direction determined by the sign of field gradient, give rise to conductivity enhancement and rectification effect with respect to the direction of DC bias current.