Spin relaxation in quantum dots due to electron exchange with leads

Details Spin relaxation in quantum dots due to electron exchange with leads Spin relaxation in quantum dots due to electron exchange with leads

2008-10-24

arxiv.org/abs/0810.4546v1

Phys. Rev. Lett. 101, 226805 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4+ pages, 3 figures, submitted to PRL

Scientific paper

10.1103/PhysRevLett.101.226805

We calculate spin relaxation rates in lateral quantum dot systems due to electron exchange between dots and leads. Using rate equations, we develop a theoretical description of the experimentally observed electric current in the spin blockade regime of double quantum dots. Single expression fits the entire current profile and describes the structure of both the conduction peaks and of the suppressed (`valley') region. Extrinsic rates calculated here have to be taken into account for accurate extraction of intrinsic relaxation rates due to the spin-orbit and hyperfine spin scattering mechanisms from spin blockade measurements.

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