Magnetic interaction between coupled quantum dots

被引：24
|
作者：
Kolehmainen, J [1 ]
Reimann, SM [1 ]
Koskinen, M [1 ]
Manninen, M [1 ]
机构：
[1] Univ Jyvaskyla, Dept Phys, SF-40351 Jyvaskyla, Finland
来源：
EUROPEAN PHYSICAL JOURNAL B | 2000年 / 13卷 / 04期
关键词：
D O I：
10.1007/s100510050092
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We study the magnetic coupling in artificial molecules composed of two and four laterally coupled quantum dots. The electronic ground-state configurations of such systems are determined by applying current spin density functional theory which allows to include effects of magnetic fields. While the ground-state of a two-dot molecule with strong enough inter-dot coupling tends to be antiferromagnetic with respect to the spins of the single dot components, we find that a square lattice of four dots has a ferromagnetic ground state.
引用
收藏
页码：731 / 736
页数：6
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