Spin degeneracy and conductance fluctuations in open quantum dots

被引：64

作者：

Folk, JA ^{[1
]}

Patel, SR

Birnbaum, KM

Marcus, CM

Duruöz, CI

Harris, JS

机构：

[1] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

[2] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[3] Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.86.2102

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The dependence of conductance fluctuations on parallel magnetic field is used as a probe of spin degeneracy in open GaAs quantum dots. The variance of fluctuations at high parallel field is reduced from the low-field variance (with broken time-reversal symmetry) by factors ranging from roughly 2 in a 1 mum(2) dot to greater than 4 in 8 mum(2) dots. The factor of 2 is expected for Zeeman splitting of spin-degenerate channels. A possible explanation for the larger suppression based on field-dependent spin-orbit scattering is proposed.

引用

页码：2102 / 2105

页数：4

共 33 条

[1] Divergence of classical trajectories and weak localization [J].