Electrical polarization of nuclear spins in a breakdown regime of quantum Hall effect

Details Electrical polarization of nuclear spins in a breakdown regime of quantum Hall effect Electrical polarization of nuclear spins in a breakdown regime of quantum Hall effect

2006-11-16

arxiv.org/abs/cond-mat/0611420v1

Appl. Phys. Lett. 90, 022102 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages, 4 figures, submitted to Appl. Phys. Lett

Scientific paper

10.1063/1.2431453

We have developed a method for electrical polarization of nuclear spins in quantum Hall systems. In a breakdown regime of odd-integer quantum Hall effect (QHE), excitation of electrons to the upper Landau subband with opposite spin polarity dynamically polarizes nuclear spins through the hyperfine interaction. The polarized nuclear spins in turn accelerate the QHE breakdown, leading to hysteretic voltage-current characteristics of the quantum Hall conductor.

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