Experimental Signature of Phonon-Mediated Spin Relaxation in a Two-Electron Quantum Dot

T. Meunier, I. T. Vink, L. H. Willems van Beveren, K-J. Tielrooij, R. Hanson, F. H. L. Koppens, H. P. Tranitz, W. Wegscheider, L. P. Kouwenhoven, and L. M. K. Vandersypen
Phys. Rev. Lett. 98, 126601 – Published 22 March 2007

Abstract

We observe an experimental signature of the role of phonons in spin relaxation between triplet and singlet states in a two-electron quantum dot. Using both the external magnetic field and the electrostatic confinement potential, we change the singlet-triplet energy splitting from 1.3 meV to zero and observe that the spin relaxation time depends nonmonotonously on the energy splitting. A simple theoretical model is derived to capture the underlying physical mechanism. The present experiment confirms that spin-flip energy is dissipated in the phonon bath.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 19 September 2006

DOI:https://doi.org/10.1103/PhysRevLett.98.126601

©2007 American Physical Society

Authors & Affiliations

T. Meunier1, I. T. Vink1, L. H. Willems van Beveren1, K-J. Tielrooij1, R. Hanson1, F. H. L. Koppens1, H. P. Tranitz2, W. Wegscheider2, L. P. Kouwenhoven1, and L. M. K. Vandersypen1

  • 1Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, The Netherlands
  • 2Institut für Angewandte und Experimentelle Physik, Universität Regensburg, Regensburg, Germany

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 98, Iss. 12 — 23 March 2007

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×