Interlayer quantum coherence and anomalous stability of v=1 bilayer quantum Hall state

被引：2
|
作者：
Sawada, A [1 ]
Ezawa, ZF
Ohno, H
Horikoshi, Y
Kishimoto, S
Matsukura, F
Ohno, Y
Yasumoto, M
Urayama, A
机构：
[1] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan
[2] Tohoku Univ, Elect Commun Res Inst, Sendai, Miyagi 9808578, Japan
[3] Waseda Univ, Sch Sci & Engn, Tokyo 1698555, Japan
来源：
PHYSICA B-CONDENSED MATTER | 1998年 / 249卷
关键词：
quantum Hall effect; fractional quantum Hall effect; double quantum wells;
D O I：
10.1016/S0921-4526(98)00326-3
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We have compared the stability of the v = 2, 1 and 2/3 quantum Hall states in a bilayer two-dimensional electron system by changing the total density and the density ratio of electrons in the two quantum wells. The following experimental results have been obtained: The v = 1 state is stable over a wide range of the density difference. It is least stable when the electron density is balanced. The state collapses when the total density is more than a critical value. The density ratio has a small influence on the stability of v = 1. These features are not shared by the other quantum Hall states. We argue that they give an indication of the interlayer quantum coherence. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：836 / 840
页数：5
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