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arXiv 0904.2619cond-mat.mes-hall
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分数量子霍尔效应击穿引起的动态核极化

Dynamic nuclear polarization induced by breakdown of fractional quantum Hall effect

Minoru Kawamura, Masashi Ono, Yoshiaki Hashimoto, Shingo Katsumoto, Kohei Hamaya, Tomoki Machida

摘要:

本文研究了分数量子霍尔效应(FQH)击穿引起的动态核极化(DNP)。我们发现,电压-电流特性依赖于电流扫描速率在量子霍尔态的朗道能级填充因子$ν$ = 1,2/3,和1/3。扫描速率的依赖性归因于DNP发生在击穿制度的DNH状态。抽运和探测实验结果表明,在FQH态击穿区域中诱导的DNP的极性与在奇数量子霍尔态击穿区域中诱导的DNP的极性相反。

英文摘要:

We study dynamic nuclear polarization (DNP) induced by breakdown of the fractional quantum Hall (FQH) effect. We find that voltage-current characteristics depend on current sweep rates at the quantum Hall states of Landau level filling factors $ν$ = 1, 2/3, and 1/3. The sweep rate dependence is attributed to DNP occurring in the breakdown regime of FQH states. Results of a pump and probe experiment show that the polarities of the DNP induced in the breakdown regimes of the FQH states is opposite to that of the DNP induced in the breakdown regimes of odd-integer quantum Hall states.

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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