DESTRUCTION OF FRACTIONAL QUANTUM HALL-EFFECT IN THICK SYSTEMS

被引:50
作者
HE, S [1 ]
ZHANG, FC [1 ]
XIE, XC [1 ]
DASSARMA, S [1 ]
机构
[1] UNIV CINCINNATI, DEPT PHYS, CINCINNATI, OH 45221 USA
来源
PHYSICAL REVIEW B | 1990年 / 42卷 / 17期
关键词
D O I
10.1103/PhysRevB.42.11376
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We study systematically the effect of finite thickness of the quasi-two-dimensional layer on the fractional quantum Hall effect using small-system calculations. As the layer thickness increases, there is a crossover from the incompressible Laughlin-type liquid to a compressible state, which has almost vanishing overlap with the Laughlin wave function. We predict that the fractional quantum Hall state will eventually be destroyed with increasing layer thickness as a consequence of the weakening of the short-range component of the interaction. The relevance of our calculation to some recent experiments in thick parabolic wells is discussed. © 1990 The American Physical Society.
引用
收藏
页码:11376 / 11379
页数:4
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