Spin Relaxation in Isotopically Purified Silicon Quantum Dots

preprint2009arXivOpen access

Abstract

We investigate spin-flip processes of Si quantum dots due to spin-orbit coupling. We utilize the spin-orbit coupling constants related to bulk and structure inversion asymmetry obtained numerically for two dimensional heterostructures. We find that the spin-flip rate is very sensitive to these coupling constants. We investigate the nuclei-mediated spin-flip process and find the level of the isotope 29^{29}Si concentration for which this mechanism become dominant.

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