Flux-quantum-modulated Kondo conductance in a multielectron quantum dot

TL;DR

This paper studies a large-electron quantum dot exhibiting a flux-quantum-modulated Kondo effect, revealing a unique magnetic flux periodicity and a regular stripe pattern, advancing understanding of quantum dot conductance behavior.

Contribution

It demonstrates flux-quantum modulation of Kondo conductance in a multielectron quantum dot, a novel phenomenon not previously reported.

Findings

Kondo effect observed without Zeeman splitting

Periodic modulation with flux quantum per dot area

Regular stripe pattern in conductance at low temperatures

Abstract

We investigate a lateral semiconductor quantum dot with a large number of electrons in the limit of strong coupling to the leads. A Kondo effect is observed and can be tuned in a perpendicular magnetic field. This Kondo effect does not exhibit Zeeman splitting. It shows a modulation with the periodicity of one flux quantum per dot area at low temperatures. The modulation leads to a novel, strikingly regular stripe pattern for a wide range in magnetic field and number of electrons.