ORIGIN OF THE V = 1/2 FRACTIONAL QUANTUM HALL STATE IN WIDE SINGLE QUANTUM-WELLS

被引：117

作者：

SUEN, YW

MANOHARAN, HC

YING, X

SANTOS, MB

SHAYEGAN, M

机构：

[1] Department of Electrical Engineering, Princeton University, Princeton

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.72.3405

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the effect of subband energy separation and asymmetry on the quasiparticle excitation gaps of the nu = 1/2 and coexisting fractional quantum Hall (FQH) states in wide single quantum wells. A new even-denominator FQH state at nu = 3/2 and a dramatic subband-mixing-driven phase transition from a one- to two-component FQH state at nu = 2/3 are observed. Our results reveal the two-component origin of the nu = 1/2 FQH state, and allow us to construct an experimental phase diagram for electron states at half filling.

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页码：3405 / 3408

页数：4

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