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Dephasing in open quantum dots

被引：102
|
作者：
Huibers, AG [1 ]
Switkes, M
Marcus, CM
Campman, K
Gossard, AC
机构：
[1] Stanford Univ, Dept Phys, Stanford, CA 94305 USA
[2] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA
来源：
PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 01期
关键词：
D O I：
10.1103/PhysRevLett.81.200
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Shape-averaged magnetoconductance (weak localization) is used for the first time to obtain the electron phase coherence time tau(phi) in open ballistic GaAs quantum dots. Values for tau(phi) in the range of temperature T from 0.34 to 4 K are found to be independent of dot area, and are not consistent with the tau(phi) proportional to T-2 behavior expected for isolated dots. Surprisingly, tau(phi)(T) agrees quantitatively with the predicted dephasing time for disordered two-dimensional electron systems.
引用
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页码：200 / 203
页数：4
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