Temperature-dependent screening of the edge state around antidots in the quantum Hall regime

TL;DR

This study investigates how temperature influences the Aharonov-Bohm oscillations and screening effects around antidots in the quantum Hall regime, revealing that the screened potential becomes steeper as temperature rises.

Contribution

It provides new insights into the temperature dependence of screening and potential profiles around antidots in the quantum Hall regime.

Findings

AB oscillation characteristics change with temperature

Screened potential becomes steeper at higher temperatures

Temperature affects the self-consistent screening around antidots

Abstract

The Aharonov-Bohm (AB) effect in a small array of antidots with large aspect ratio is investigated in the quantum Hall regime. The evolution with temperature of the AB oscillations in the magnetic field vs gate voltage (B-Vg) plane reveals the temperature dependence of the screening. The self-consistently screened potential of the compressible band surrounding an antidot is observed to gain progressively steeper slope with increasing temperature.