Spontaneously broken time-reversal symmetry in quantum dots

被引：17
|
作者：
Steffens, O [1 ]
Suhrke, M [1 ]
Rossler, U [1 ]
机构：
[1] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany
来源：
EUROPHYSICS LETTERS | 1998年 / 44卷 / 02期
关键词：
D O I：
10.1209/epl/i1998-00460-0
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present current-spin density-functional calculations for circular parabolic quantum dots in zero magnetic field. We find the possibility for broken time-reversal symmetry via exchange correlation with spontaneously induced orbital currents. For certain electron numbers, this results in new current textures which give rise to a finite magnetization even for ground states with vanishing total angular momentum.
引用
收藏
页码：222 / 228
页数：7
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