Experimental signature of phonon-mediated spin relaxation

Details Experimental signature of phonon-mediated spin relaxation Experimental signature of phonon-mediated spin relaxation

2006-09-28

arxiv.org/abs/cond-mat/0609726v1

Phys. Rev. Lett 98, 126601 (2007)

Physics

Condensed Matter

Other Condensed Matter

5 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.98.126601

We observe an experimental signature of the role of the 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 non-monotonously 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.

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