Interaction-Induced Spin Polarization in Quantum Dots

被引：24

作者：

Rogge, M. C. ^{[1
]}

Rasanen, E. ^{[2
]}

Haug, R. J. ^{[1
]}

机构：

[1] Leibniz Univ Hannover, Inst Festkorperphys, D-30167 Hannover, Germany

[2] Univ Jyvaskyla, Dept Phys, Nanosci Ctr, FI-40014 Jyvaskyla, Finland

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 04期

基金：

芬兰科学院;

关键词：

DENSITY-FUNCTIONAL THEORY; ELECTRON; CONDUCTANCE; OXIDATION; BLOCKADE;

D O I：

10.1103/PhysRevLett.105.046802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The electronic states of lateral many-electron quantum dots in high magnetic fields are analyzed in terms of energy and spin. In a regime with two Landau levels in the dot, several Coulomb-blockade peaks are measured. A zigzag pattern is found as it is known from the Fock-Darwin spectrum. However, only data from Landau level 0 show the typical spin-induced bimodality, whereas features from Landau level 1 cannot be explained with the Fock-Darwin picture. Instead, by including the interaction effects within spin-density-functional theory a good agreement between experiment and theory is obtained. The absence of bimodality on Landau level 1 is found to be due to strong spin polarization.

引用

页数：4

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