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.

引用

页数：4