Spontaneous symmetry breaking in single and molecular quantum dots

被引：233

作者：

Yannouleas, C ^{[1
]}

Landman, U ^{[1
]}

机构：

[1] Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.82.5325

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Classes of spontaneous symmetry breaking at zero and low magnetic fields in single quantum dots (QD's) and quantum dot molecules (QDM's) are discussed in relation to the ratio R-W between the interelectron Coulomb repulsion and the harmonic confinement, using spin-and-space unrestricted Hartree-Fock calculations. These include Wigner crystallization for R-W > 1, and formation of noncrystallized electron puddles localized on the individual dots in QDM's, as well as spin-density waves in single QD's, for R-W < 1.

引用

页码：5325 / 5328

页数：4

共 24 条

[1]

ANDERSONPW, 1984, BASIC NOTIONS CONDEN

[2] Electrons in artificial atoms [J].

Ashoori, RC .

NATURE, 1996, 379 (6564) :413-419

[3]

BARNETT RN, IN PRESS EUR PHYS D

[4] CLASSICAL-MODEL OF A WIGNER CRYSTAL IN A QUANTUM DOT [J].

BOLTON, F ;

ROSSLER, U .

SUPERLATTICES AND MICROSTRUCTURES, 1993, 13 (02) :139-145

[5] WIGNER MOLECULES IN NANOSTRUCTURES [J].

JAUREGUI, K ;

HAUSLER, W ;

KRAMER, B .

EUROPHYSICS LETTERS, 1993, 24 (07) :581-587

[6] THE DENSITY FUNCTIONAL FORMALISM, ITS APPLICATIONS AND PROSPECTS [J].

JONES, RO ;

GUNNARSSON, O .

REVIEWS OF MODERN PHYSICS, 1989, 61 (03) :689-746

[7] Hund's rules and spin density waves in quantum dots [J].

Koskinen, M ;

Manninen, M ;

Reimann, SM .

PHYSICAL REVIEW LETTERS, 1997, 79 (07) :1389-1392

[8] ANOMALOUS QUANTUM HALL-EFFECT - AN INCOMPRESSIBLE QUANTUM FLUID WITH FRACTIONALLY CHARGED EXCITATIONS [J].

LAUGHLIN, RB .

PHYSICAL REVIEW LETTERS, 1983, 50 (18) :1395-1398

[9] Shell filling of artificial atoms within density-functional theory [J].

Lee, IH ;

Rao, V ;

Martin, RM ;

Leburton, JP .

PHYSICAL REVIEW B, 1998, 57 (15) :9035-9042

[10] Evidence for an anisotropic state of two-dimensional electrons in high Landau levels [J].

Lilly, MP ;

Cooper, KB ;

Eisenstein, JP ;

Pfeiffer, LN ;

West, KW .

PHYSICAL REVIEW LETTERS, 1999, 82 (02) :394-397

← 1 2 3 →