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arXiv 0711.3259cond-mat.mes-hall
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整数量子霍尔效应击穿区的动态核极化和Knight位移测量

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

摘要:

核自旋在奇整数量子霍尔效应(QHE)的击穿机制中被电极化。电子激发到具有相反自旋极性的上朗道子带,通过超精细相互作用翻转核自旋。极化核自旋降低了自旋分裂能,加速了QHE击穿。在射频磁场的照射过程中,也可以通过调整电子密度来测量核自旋的奈特位移。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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