Functional renormalization group approach to the singlet-triplet transition in 
quantum dots

Magnusson, E. B.; Hasselmann, N.; Shelykh, I. A.

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Functional renormalization group approach to the singlet-triplet transition in quantum dots

MPS-Authors

Hasselmann, N.
Max Planck Society;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Magnusson, E. B., Hasselmann, N., & Shelykh, I. A. (2012). Functional renormalization group approach to the singlet-triplet transition in quantum dots. Journal of Physics: Condensed Matter, 24(36): 365602.

Cite as: https://hdl.handle.net/21.11116/0000-000E-C201-5

Abstract

We present a functional renormalization group approach to the zero bias transport properties of a quantum dot with two different orbitals and in the presence of Hund's coupling. Tuning the energy separation of the orbital states, the quantum dot can be driven through a singlet-triplet transition. Our approach, based on the approach by Karrasch et al (2006 Phys. Rev. B 73 235337), which we apply to spin-dependent interactions, recovers the key characteristics of the quantum dot transport properties with very little numerical effort. We present results on the conductance in the vicinity of the transition and compare our results both with previous numerical renormalization group results and with predictions of the perturbative renormalization group.