Nonconventional Odd-Denominator Fractional Quantum Hall States in the Second Landau Level

被引：114
|
作者：
Kumar, A. [1 ]
Csathy, G. A.
Manfra, M. J. [1 ,2 ]
Pfeiffer, L. N. [3 ]
West, K. W. [3 ]
机构：
[1] Purdue Univ, Dept Phys, Birck Nanotechnol Ctr, Sch Mat Engn, W Lafayette, IN 47907 USA
[2] Purdue Univ, Sch Elect & Comp Engn, W Lafayette, IN 47907 USA
[3] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA
来源：
PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 24期
基金：
美国国家科学基金会;
关键词：
FILLING FACTOR; CHARGE;
D O I：
10.1103/PhysRevLett.105.246808
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report the observation of a new fractional quantum Hall state in the second Landau level of a two-dimensional electron gas at the Landau level filling factor nu = 2 + 6/13. We find that the model of noninteracting composite fermions can explain the magnitude of gaps of the prominent 2 + 1/3 and 2 + 2/3 states. The same model fails, however, to account for the gaps of the 2 + 2/5 and the newly observed 2 + 6/13 states suggesting that these two states are of exotic origin.
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页数：4
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