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arXiv 1302.3986cond-mat.str-el
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激子屏蔽在7/3分数量子霍尔效应中的作用

Role of exciton screening in the 7/3 fractional quantum Hall effect

Ajit C. Balram, Ying-Hai Wu, G. J. Sreejith, Arkadiusz Wójs, Jainendra K. Jain

摘要:

7/3分数霍尔态是第二朗道能级中最突出的态之一,它的激发态还不清楚。我们研究了复合费米子激子的屏蔽效应,发现由于复合费米子之间相对较小的激子能隙和相对较大的剩余相互作用,复合费米子激子的屏蔽效应在7/3处引起了较强的重整化。7/3态的激发态被看作是由一个大的激子云装扮的复合费米子。它们的广泛程度的实验以及有限系统精确对角化研究的分析的影响。

英文摘要:

The excitations of the 7/3 fractional Hall state, one of the most prominent states in the second Landau level, are not understood. We study the effect of screening by composite fermion excitons and find that it causes a strong renormalization at 7/3, thanks to a relatively small exciton gap and a relatively large residual interaction between composite fermions. The excitations of the 7/3 state are to be viewed as composite fermions dressed by a large exciton cloud. Their wide extent has implications for experiments as well as for analysis of finite system exact diagonalization studies.

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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