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

M. Kawamura; H. Takahashi; K. Sugihara; S. Masubuchi; K. Hamaya; T. Machida

doi:10.1063/1.2431453

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

Mesoscale and Nanoscale Physics 2007-05-23 v1

Authors: M. Kawamura , H. Takahashi , K. Sugihara , S. Masubuchi , K. Hamaya , T. Machida

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Abstract

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.

Keywords

nuclear spin polarization quantum Hall effect breakdown regime hyperfine interaction Landau subband hysteresis

Cite

@article{arxiv.cond-mat/0611420,
  title  = {Electrical polarization of nuclear spins in a breakdown regime of quantum Hall effect},
  author = {M. Kawamura and H. Takahashi and K. Sugihara and S. Masubuchi and K. Hamaya and T. Machida},
  journal= {arXiv preprint arXiv:cond-mat/0611420},
  year   = {2007}
}

Comments

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

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

Abstract

Keywords

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