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

被引：116
|
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.
引用
收藏
页码：3405 / 3408
页数：4
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