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

DOI to cite this document:: 10.5283/epub.12298

Meunier, T. ; Vink, I. T. ; Beveren, L. H. Willems van ; Tielrooij, K.-J. ; Koppens, F. H. L. ; Tranitz, Hans-Peter ; Wegscheider, Werner ; Kouwenhoven, Leo P. ; Vandersypen, L. M. K.

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Date of publication of this fulltext: 25 Jan 2010 13:38

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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 ...