Electron spin relaxation by nuclei in semiconductor quantum dots

By I. Merkulov, A. Efros, M. Institute, R. Science, S. Petersburg, Russia., Naval Reserach Laboratory, Nanostructure Optics Section, Dc Washington. 2002

694 citations recorded by the source corpus.

We have studied theoretically electron spin relaxation in semiconductor quantum dots via interaction with nuclear spins. The relaxation is shown to be determined by three processes: (i) the precession of the electron spin in the hyperfine field of the frozen fluctuation of the nuclear spins; (ii) the precession of the nuclear spins in the hyperfine field of the electron; and (iii) the precession of the nuclear spin in the dipole field of its nuclear neighbors. In external magnetic fields the relaxation of electron spins directed along the magnetic field is suppressed. Electron spins directed transverse to the magnetic field relax completely in a time on the order of the precession period of its spin in the field of the frozen fluctuation of the nuclear spins. Comparison with experiment shows that the hyperfine interaction with nuclei may be the dominant mechanism of electron spin relaxation in quantum dots.

Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/3910507ce8d90831e6524697a1f08aa716fe4d84

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Citations in the corpus

Spins in few-electron quantum dots (2006, background): “…drawn from a Gaussian distribution of nuclear fields with standard deviation √ 〈(BzN )2〉 (e.g. when every nuclear spin had equal probabilities for being up or down), the decay would be Gaussian as well, i.e. of the form exp(−t2/(T ∗2 )2), where (Merkulov et al., 2002) T ∗2 = h̄ gµB √ 2〈(BzN )2〉 .”
Nuclear spin physics in quantum dots: an optical investigation (2012, methodology): “(34) (see Merkulov et al. (2002) and Testelin et al. (2009)), as semi-classical magnetic fields randomly distributed from dot to dot.”
Dynamics of non-Markovian open quantum systems (2015, background): “An example of the central spin model is an electron in a quantum dot coupled due to a hyperfine interaction with the surrounding nuclear spins (Coish and Loss, 2004; Kessler et al., 2012; Khaetskii et al., 2002; Merkulov et al., 2002; Schliemann et al., 2003; Schuetz et al., 2012).”
Review of performance metrics of spin qubits in gated semiconducting nanostructures (2021, neutral): “[157, 214] and confirmed experimentally in Ref.”