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

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

2011-11-29

arxiv.org/abs/1111.6873v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

supplementary material here: http://marcuslab.harvard.edu/SiDQDsupp.pdf

Scientific paper

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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