Resistively detected NMR of the ν=1 quantum Hall state: A tilted magnetic field study

被引：14
作者：
Bowers, C. R. [1 ]
Gusev, G. M. [2 ]
Jaroszynski, J. [3 ]
Reno, J. L. [4 ]
Simmons, J. A. [4 ]
机构：
[1] Univ Florida, Dept Chem, Gainesville, FL 32611 USA
[2] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil
[3] Natl High Magnet Field Lab, Tallahassee, FL 32306 USA
[4] Sandia Natl Labs, Albuquerque, NM 87185 USA
来源：
PHYSICAL REVIEW B | 2010年 / 81卷 / 07期
关键词：
SPIN; EXCITATIONS; WELLS; ORIENTATION; DEPENDENCE; SKYRMIONS;
D O I：
10.1103/PhysRevB.81.073301
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Previous resistively detected NMR (RDNMR) studies on the nu approximate to 1 quantum Hall state have reported a "dispersionlike" line shape and extremely short nuclear-spin-lattice relaxation times, observations which have been attributed to the formation of a skyrme lattice. Here we examine the evolution of the RDNMR line shape and nuclear-spin relaxation for Zeeman: Coulomb energy ratios ranging from 0.012 to 0.036. According to theory, suppression of the skyrme crystal, along with the associated Goldstone mode nuclear-spin-relaxation mechanism, is expected at the upper end of this range. However, we find that the anomalous line shape persists at high Zeeman energy, and only a modest decrease in the RDNMR-detected nuclear-spin-relaxation rate is observed.
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页数：4
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