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arXiv · 1111.6873

Magnetic field dependence of Pauli spin blockade: a window into the sources of spin relaxation in silicon quantum dots

G. Yamahata·T. Kodera·H. O. H. Churchill·K. Uchida·C. M. Marcus·S. Oda
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Abstract

We investigate spin relaxation in a silicon double quantum dot via leakage current through Pauli blockade as a function of interdot detuning and magnetic field. A dip in leakage current as a function of magnetic field on a \sim 40 mT field scale is attributed to spin-orbit mediated spin relaxation. On a larger (\sim 400 mT) field scale, a peak in leakage current is seen in some, but not all, Pauli-blocked transitions, and is attributed to spin-flip cotunneling. Both dip and peak structure show good agreement between theory and experiment.

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G. Yamahata, T. Kodera, H. O. H. Churchill, K. Uchida, C. M. Marcus, S. Oda. 2011-11-29. Magnetic field dependence of Pauli spin blockade: a window into the sources of spin relaxation in silicon quantum dots. https://doi.org/10.1103/physrevb.86.115322

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