Multiple transitions of the spin configuration in quantum dots

TL;DR

This paper investigates spin configuration transitions in many-electron quantum dots under high magnetic fields, combining theoretical predictions with experimental detection of multiple spin states through spin blockade and Kondo effects.

Contribution

It presents the first combined theoretical and experimental study revealing multiple spin configuration transitions in quantum dots induced by changing electron numbers.

Findings

Detection of five distinct spin configuration regions

Observation of transitions induced by electron number variation

Identification of spin blockade and Kondo effects as detection methods

Abstract

Single electron tunneling is studied in a many electron quantum dot in high magnetic fields. For such a system multiple transitions of the spin configuration are theoretically predicted. With a combination of spin blockade and Kondo effect we are able to detect five regions with different spin configurations. Transitions are induced with changing electron numbers.