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Phys Rev Lett. 2008 Feb 8;100(5):056603. Epub 2008 Feb 7.

Nuclear tuning and detuning of the electron spin resonance in a quantum dot: theoretical consideration.

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Kavli Institute of NanoScience, Delft University of Technology, 2628 CJ Delft, The Netherlands.


We study nuclear spin dynamics in a quantum dot close to the conditions of electron spin resonance. We show that at a small frequency mismatch, the nuclear field detunes the resonance. Remarkably, at larger frequency mismatch, its effect is opposite: The nuclear system is bistable, and in one of the stable states, the field accurately tunes the electron spin splitting to resonance. In this state, the nuclear field fluctuations are strongly suppressed, and nuclear spin relaxation is accelerated.

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