Spin relaxation rates in quasi-one-dimensional coupled quantum dots

Details Spin relaxation rates in quasi-one-dimensional coupled quantum dots Spin relaxation rates in quasi-one-dimensional coupled quantum dots

2005-08-12

arxiv.org/abs/cond-mat/0508303v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 figures, Submitted to Applied Physics Letters

Scientific paper

10.1103/PhysRevB.74.155433

We study theoretically the spin relaxation rate in quasi-one-dimensional coupled double semiconductor quantum dots. We consider InSb and GaAs-based systems in the presence of the Rashba spin-orbit interaction, which causes mixing of opposite-spin states, and allows phonon-mediated transitions between energy eigenstates. Contributions from all phonon modes and coupling mechanisms in zincblende semiconductors are taken into account. The spin relaxation rate is shown to display a sharp, cusp-like maximum as function of the interdot-barrier width, at a value of the width which can be controlled by an external magnetic field. This remarkable behavior is associated with the symmetric-antisymmetric level splitting in the structure.

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