Resistively detected NMR in a two-dimensional electron system near ν=1:: Clues to the origin of the dispersive lineshape -: art. no. 121306

被引:34
作者
Tracy, LA [1 ]
Eisenstein, JP
Pfeiffer, LN
West, KW
机构
[1] CALTECH, Pasadena, CA 91125 USA
[2] Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA
来源
PHYSICAL REVIEW B | 2006年 / 73卷 / 12期
基金
美国国家科学基金会;
关键词
D O I
10.1103/PhysRevB.73.121306
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Resistively detected nuclear magnetic resonance (NMR) measurements on 2D electron systems near the nu=1 quantum Hall state are reported. In contrast to recent results of Gervais [Phys. Rev. Lett. 94, 196803 (2005)], a dispersive line shape is found at all radio-frequency powers studied and Korringa-type nuclear spin-lattice relaxation is observed. The shape of the unexplained dispersive line shape is found to invert when the temperature derivative of the longitudinal resistance changes sign. This suggests that both Zeeman and thermal effects are important to resistively detected NMR in this regime.
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页数:4
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