Time-dependent density functional theory of excitation energies of closed-shell quantum dots

Kenji Hirose; Yigal Meir; Ned S. Wingreen

doi:10.1016/j.physe.2003.12.051

Time-dependent density functional theory of excitation energies of closed-shell quantum dots

Kenji Hirose, Yigal Meir, Ned S. Wingreen

Department of Physics

Research output: Contribution to journal › Conference article › peer-review

6 Scopus citations

Abstract

We study the low-energy excitations of two-dimensional elliptical quantum dots with closed-shell structures using time-dependent density functional theory (TDDFT). We find that TDDFT gives fairly accurate results for the low-energy excitations and describes the spin singlet-triplet transition due to the exchange energy. The deviations from exact-diagonalization results are less than 0.20 meV. We show the dependence of excitation energies on the strength of Coulomb interaction and the photoabsorption spectra.

Original language	English
Pages (from-to)	486-489
Number of pages	4
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	22
Issue number	1-3
DOIs	https://doi.org/10.1016/j.physe.2003.12.051
State	Published - 1 Apr 2004
Event	15th International Conference on ELectronic Propreties - Nara, Japan Duration: 14 Jul 2003 → 18 Jul 2003

Keywords

Excitation energy
Quantum dots
Time-dependent density functional theory

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics

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10.1016/j.physe.2003.12.051

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title = "Time-dependent density functional theory of excitation energies of closed-shell quantum dots",

abstract = "We study the low-energy excitations of two-dimensional elliptical quantum dots with closed-shell structures using time-dependent density functional theory (TDDFT). We find that TDDFT gives fairly accurate results for the low-energy excitations and describes the spin singlet-triplet transition due to the exchange energy. The deviations from exact-diagonalization results are less than 0.20 meV. We show the dependence of excitation energies on the strength of Coulomb interaction and the photoabsorption spectra.",

keywords = "Excitation energy, Quantum dots, Time-dependent density functional theory",

author = "Kenji Hirose and Yigal Meir and Wingreen, {Ned S.}",

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TY - JOUR

T1 - Time-dependent density functional theory of excitation energies of closed-shell quantum dots

AU - Hirose, Kenji

AU - Meir, Yigal

AU - Wingreen, Ned S.

PY - 2004/4/1

Y1 - 2004/4/1

N2 - We study the low-energy excitations of two-dimensional elliptical quantum dots with closed-shell structures using time-dependent density functional theory (TDDFT). We find that TDDFT gives fairly accurate results for the low-energy excitations and describes the spin singlet-triplet transition due to the exchange energy. The deviations from exact-diagonalization results are less than 0.20 meV. We show the dependence of excitation energies on the strength of Coulomb interaction and the photoabsorption spectra.

AB - We study the low-energy excitations of two-dimensional elliptical quantum dots with closed-shell structures using time-dependent density functional theory (TDDFT). We find that TDDFT gives fairly accurate results for the low-energy excitations and describes the spin singlet-triplet transition due to the exchange energy. The deviations from exact-diagonalization results are less than 0.20 meV. We show the dependence of excitation energies on the strength of Coulomb interaction and the photoabsorption spectra.

KW - Excitation energy

KW - Quantum dots

KW - Time-dependent density functional theory

UR - http://www.scopus.com/inward/record.url?scp=1842633264&partnerID=8YFLogxK

U2 - 10.1016/j.physe.2003.12.051

DO - 10.1016/j.physe.2003.12.051

M3 - Conference article

AN - SCOPUS:1842633264

SN - 1386-9477

VL - 22

SP - 486

EP - 489

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 1-3

T2 - 15th International Conference on ELectronic Propreties

Y2 - 14 July 2003 through 18 July 2003

ER -

Time-dependent density functional theory of excitation energies of closed-shell quantum dots

Abstract

Keywords

ASJC Scopus subject areas

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