Raith, Martin and Stano, Peter and Baruffa, Fabio and Fabian, Jaroslav (2012) Theory of Spin Relaxation in Two-Electron Lateral Coupled Quantum Dots. Physical Review Letters (PRL) 108 (24), p. 246602.
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Other URL: http://arxiv.org/abs/1111.6724
A global quantitative picture of the phonon-induced two-electron spin relaxation in GaAs double quantum dots is presented using highly accurate numerics. Wide regimes of interdot coupling, magnetic field magnitude and orientation, and detuning are explored in the presence of a nuclear bath. Mostimportant, the giant magnetic anisotropy of the singlet-triplet relaxation can be controlled by detuning switching the principal anisotropy axes: a protected state becomes unprotected upon detuning and vice versa. It is also established that nuclear spins can dominate spin relaxation for unpolarized triplets even at high magnetic fields, contrary to common belief.
|Institutions:||Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Jaroslav Fabian|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Owner:||Dipl.-Phys. Martin Raith|
|Deposited On:||01 Dec 2011 07:53|
|Last Modified:||15 Jun 2012 10:11|
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