Magnetic field dependence of quantum dot ground states

被引：3

作者：

Cavaliere, F. ^{[1
]}

De Giovannini, U. ^{[1
]}

Cenni, R. ^{[2
]}

Sassetti, M. ^{[1
]}

Kramer, B. ^{[3
,4
]}

机构：

[1] Univ Genoa, Dipartimento Fis, CNR, LAMIA INFM, I-16146 Genoa, Italy

[2] Univ Genoa, Dipartimento Fis, Ist Nazl Fis Nucl, I-16146 Genoa, Italy

[3] Univ Hamburg, Inst Theoret Phys, D-920355 Hamburg, Germany

[4] Jacobs Univ Bremen, D-28759 Bremen, Germany

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2008年 / 40卷 / 05期

关键词：

quantum dots; Hartree Fock; spin; spin blockade;

D O I：

10.1016/j.physe.2007.09.032

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We study the ground states of a planar quantum dot with N = 5,6,7 electrons, in the presence of a perpendicular magnetic field. Using a spatially unrestricted Hartree Fock technique followed by spin and angular momentum symmetry restoration, chemical potentials are calculated and transitions between different ground states are identified. A spin blockade in the 6 -> 7 transition is found. The structure of the quantum dot wave functions is illustrated by their electron densities. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：1427 / 1429

页数：3

共 13 条

[1]

Darwin CG, 1931, P CAMB PHILOS SOC, V27, P86

[2] Spin and rotational symmetries in unrestricted Hartree-Fock states of quantum dots [J].

De Giovannini, U. ;

Cavaliere, F. ;

Cenni, R. ;

Sassetti, M. ;

Kramer, B. .

NEW JOURNAL OF PHYSICS, 2007, 9

[3] Note to the Quantification of the harmonic Oscillator in a Magnetic Field [J].

Fock, V. .

ZEITSCHRIFT FUR PHYSIK, 1928, 47 (5-6) :446-448

[4] Few-electron quantum dots [J].

Kouwenhoven, LP ;

Austing, DG ;

Tarucha, S .

REPORTS ON PROGRESS IN PHYSICS, 2001, 64 (06) :701-736

[5] QUANTUM THEORY OF MANY-PARTICLE SYSTEMS .1. PHYSICAL INTERPRETATIONS BY MEANS OF DENSITY MATRICES, NATURAL SPIN-ORBITALS, AND CONVERGENCE PROBLEMS IN THE METHOD OF CONFIGURATIONAL INTERACTION [J].

LOWDIN, PO .

PHYSICAL REVIEW, 1955, 97 (06) :1474-1489

[6] QUANTUM THEORY OF MANY-PARTICLE SYSTEMS .3. EXTENSION OF THE HARTREE-FOCK SCHEME TO INCLUDE DEGENERATE SYSTEMS AND CORRELATION EFFECTS [J].

LOWDIN, PO .

PHYSICAL REVIEW, 1955, 97 (06) :1509-1520

[7] Phase transitions in quantum dots [J].

Muller, HM ;

Koonin, SE .

PHYSICAL REVIEW B, 1996, 54 (20) :14532-14539

[8] End states due to a spin-Peierls transition in quantum wires [J].

Reimann, SM ;

Koskinen, M ;

Manninen, M .

PHYSICAL REVIEW B, 1999, 59 (03) :1613-1616

[9] Electronic structure of quantum dots [J].

Reimann, SM ;

Manninen, M .

REVIEWS OF MODERN PHYSICS, 2002, 74 (04) :1283-1342

[10]

Ring P., 2004, The Nuclear Many-Body Problem, DOI 10.1007/978-3-642-61852-9

← 1 2 →