Saturation of phase breaking in an open ballistic quantum dot

被引:76
作者
Pivin, DP [1 ]
Andersen, A
Bird, JP
Ferry, DK
机构
[1] Arizona State Univ, Dept Elect Engn, Tempe, AZ 85287 USA
[2] Arizona State Univ, Ctr Solid State Elect Res, Tempe, AZ 85287 USA
关键词
D O I
10.1103/PhysRevLett.82.4687
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A variation in the saturated phase-breaking time in a ballistic quantum dot is found to occur as the size is varied. This variation differs from that observed earlier, in which a transition from quasi-two-dimensional to zero-dimensional behavior was thought to occur. Instead, these results suggest that the saturated phase-breaking rate is governed by a change in the total number of electrons within the dot. At higher temperatures, the phase breaking is governed by coupling to the quantum wire leads, and tau(phi) may show the T-2/3 variation expected for a one-dimensional wire due to the electron-electron interaction. [S0031-9007(99)09335-7].
引用
收藏
页码:4687 / 4690
页数:4
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