Experimental realization of a Fabry-Perot-type interferometer by co-propagating edge states in the quantum Hall regime

TL;DR

This paper reports the experimental creation of a Fabry-Perot interferometer using co-propagating edge states in the quantum Hall regime, demonstrating interference effects in electron transport.

Contribution

It introduces a novel experimental geometry that enables interference of co-propagating quantum Hall edge states, a new approach in electron interferometry.

Findings

Oscillations in current due to interference observed

Visibility increases at high magnetic fields

Demonstrates control of electron interference in quantum Hall systems

Abstract

A Fabry-Perot-type interferometer is experimentally realized for electrons in a semiconductor device. A special experimental geometry creates interference conditions for co-propagating electrons in quantum Hall edge states, which results in oscillations of the current through the device. The visibility of these oscillations is found to increase at the high-field edge of the quantum Hall plateau.