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

页码：731 / 736

页数：6

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