Scientific-technical journal


A new method of spin orientation is proposed in this work - the dynamic polarization of the spins of localized electrons interacting with nuclear spin fluctuations in a small magnetic field. It is shown that the dynamic polarization of electron spins has a number of advantages: it is realized in low magnetic fields, the direction of which can be easily changed; occurs with nonresonant and unpolarized excitation; does not depend on temperature, insofar as the main mechanism of electron spin relaxation is hyperfine interaction with nuclei; under optimal conditions, it achieves 100% spin polarization.

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[1] A. V. Shchepetilnikov, D. D. Frolov, Yu. A. Nefyodov, I. V. Kukushkin, D. S. Smirnov, L. Tiemann, C. Reichl, W. Dietsche, and W. Wegscheider. Nuclear magnetic resonance and nuclear spin relaxation in AlAs quantum well probed by ESR. Phys. Rev. B 94, 241302(R) (2016).

[2] M. S. Kuznetsova, J. Rautert, K. V. Kavokin, D. S. Smirnov, D. R. Yakovlev, A. K. Bakarov, A. K. Gutakovskii, T. S. Shamirzaev, and M. Bayer. Electron-nuclei interaction in the X valley of (In,Al)As/AlAs quantum dots. Phys. Rev. B 101, 075412 (2020).

[3] D. S. Smirnov, T. S. Shamirzaev, D. R. Yakovlev, and M. Bayer. Dynamic Polarization of Electron Spins Interacting with Nuclei in Semiconductor Nanostructures. Phys. Rev. Lett. 125, 156801 (2020).



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