Interaction-induced spin polarization in quantum dots

authored by

M. C. Rogge, E. Räsänen, R. J. Haug

Abstract

The electronic states of lateral many-electron quantum dots in high magnetic fields are analyzed in terms of energy and spin. In a regime with two Landau levels in the dot, several Coulomb-blockade peaks are measured. A zigzag pattern is found as it is known from the Fock-Darwin spectrum. However, only data from Landau level 0 show the typical spin-induced bimodality, whereas features from Landau level 1 cannot be explained with the Fock-Darwin picture. Instead, by including the interaction effects within spin-density-functional theory a good agreement between experiment and theory is obtained. The absence of bimodality on Landau level 1 is found to be due to strong spin polarization.

Organisation(s)

Institute of Solid State Physics

External Organisation(s)

University of Jyvaskyla

Type

Article

Journal

Physical review letters

Volume

105

ISSN

0031-9007

Publication date

20.07.2010

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

General Physics and Astronomy

Electronic version(s)

https://doi.org/10.1103/PhysRevLett.105.046802 (Access: Unknown)