arXiv:0711.3259 [cond-mat.mes-hall]AbstractReferencesReviewsResources
Dynamic nuclear polarization and Knight shift measurements in a breakdown regime of integer quantum Hall effect
M. Kawamura, H. Takahashi, S. Masubuchi, Y. Hashimoto, S. Katsumoto, K. Hamaya, T. Machida
Published 2007-11-21Version 1
Nuclear spins are polarized electrically in a breakdown regime of an odd-integer quantum Hall effect (QHE). Electron excitation to the upper Landau subband with the opposite spin polarity flips nuclear spins through the hyperfine interaction. The polarized nuclear spins reduce the spin-splitting energy and accelerate the QHE breakdown. The Knight shift of the nuclear spins is also measured by tuning electron density during the irradiation of radio-frequency magnetic fields.
Comments: 3 pages, 2 figures, EP2DS-17
Journal: Physica E 40, p. 1389 (2008).
Categories: cond-mat.mes-hall
Keywords: integer quantum hall effect, dynamic nuclear polarization, knight shift measurements, breakdown regime, polarity flips nuclear spins
Tags: journal article
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