Nuclear Tuning and Detuning of the Electron Spin Resonance in a Quantum Dot

Abstract

We study nuclear spin dynamics in a quantum dot close to the conditions of electron spin resonance. We show that at 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.

4 pages, 3 figures

References in corpus (2)

• Driven coherent oscillations of a single electron spin in a quantum dot
• Hyperfine-mediated gate-driven electron spin resonance

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• Spin-polarized currents in double and triple quantum dots driven by ac magnetic fields
• Many-body singlets by dynamic spin polarization
• Balancing coherent and dissipative dynamics in a central-spin system
• Driven dynamics of a quantum dot electron spin coupled to bath of higher-spin nuclei
• Transport blocking and topological phases using ac magnetic fields
• Dynamical nuclear spin polarization in a quantum dot with an electron spin driven by electric dipole spin resonance