Interplay of Coulomb interaction and spin-orbit effects in multilevel quantum dots

Autor(en)

Stephan Grap, Volker Meden, Sabine Andergassen

Abstrakt

We study electron transport through a multilevel quantum dot with Rashba spin-orbit interaction in the presence of local Coulomb repulsion. We focus on the parameter regime in which the level spacing is larger than the level broadening. Motivated by recent experiments, we compute the level splitting induced by the spin-orbit interaction at finite Zeeman fields B, which provides a measure of the renormalized spin-orbit energy. This level splitting is responsible for the suppression of the Kondo ridges at finite B characteristic for the multilevel structure. In addition, the dependence of renormalized g factors on the relative orientation of the applied B field and the spin-orbit direction following two different protocols used in experiments is investigated.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Rheinisch-Westfälische Technische Hochschule Aachen

Journal

Physical Review B

Band

86

Anzahl der Seiten

10

ISSN

1098-0121

DOI

https://doi.org/10.1103/PhysRevB.86.035143

Publikationsdatum

2012

Peer-reviewed

Ja

ÖFOS 2012

103026 Quantenoptik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/25fa2413-53b6-4c8d-8f90-71cb99a36752