Exact Diagonal Calculations of Coulomb Oscillations in Quantum Dots

Research output: Contribution to journalArticle

Abstract

Transport properties through a quantum dot are examined based on exact diagonal calculations of many-body states, when the Coulomb interaction energy is comparable with one-electron level spacings. The peak positions of Coulomb oscillation show an atomic-like shell structure of one-electron levels, in agreement with recent experimental results. Some peaks of the conductance increase in height with increasing temperature. This anomalous temperature dependence reflects a level spacing as small as 1K and total spin of the ground state. The transport properties through coupled two dots are also investigated. We show that the correlation effect influences the peak heights of the conductance. These phenomena exemplify the observation of many-body wavefunctions in quantum dots, by the Coulomb oscillation.

Original languageEnglish
Pages (from-to)199-202
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Volume205
Issue number1
Publication statusPublished - 1998 Jan

Fingerprint

Semiconductor quantum dots
quantum dots
Electron transport properties
oscillations
Electrons
Wave functions
Coulomb interactions
transport properties
spacing
Transport properties
Ground state
Temperature
electrons
temperature dependence
ground state
interactions
temperature
energy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Exact Diagonal Calculations of Coulomb Oscillations in Quantum Dots. / Eto, Mikio.

In: Physica Status Solidi (B) Basic Research, Vol. 205, No. 1, 01.1998, p. 199-202.

Research output: Contribution to journalArticle

@article{e53f1a43cc5e4d698a1b739758675924,
title = "Exact Diagonal Calculations of Coulomb Oscillations in Quantum Dots",
abstract = "Transport properties through a quantum dot are examined based on exact diagonal calculations of many-body states, when the Coulomb interaction energy is comparable with one-electron level spacings. The peak positions of Coulomb oscillation show an atomic-like shell structure of one-electron levels, in agreement with recent experimental results. Some peaks of the conductance increase in height with increasing temperature. This anomalous temperature dependence reflects a level spacing as small as 1K and total spin of the ground state. The transport properties through coupled two dots are also investigated. We show that the correlation effect influences the peak heights of the conductance. These phenomena exemplify the observation of many-body wavefunctions in quantum dots, by the Coulomb oscillation.",
author = "Mikio Eto",
year = "1998",
month = "1",
language = "English",
volume = "205",
pages = "199--202",
journal = "Physica Status Solidi (B): Basic Research",
issn = "0370-1972",
publisher = "Wiley-VCH Verlag",
number = "1",

}

TY - JOUR

T1 - Exact Diagonal Calculations of Coulomb Oscillations in Quantum Dots

AU - Eto, Mikio

PY - 1998/1

Y1 - 1998/1

N2 - Transport properties through a quantum dot are examined based on exact diagonal calculations of many-body states, when the Coulomb interaction energy is comparable with one-electron level spacings. The peak positions of Coulomb oscillation show an atomic-like shell structure of one-electron levels, in agreement with recent experimental results. Some peaks of the conductance increase in height with increasing temperature. This anomalous temperature dependence reflects a level spacing as small as 1K and total spin of the ground state. The transport properties through coupled two dots are also investigated. We show that the correlation effect influences the peak heights of the conductance. These phenomena exemplify the observation of many-body wavefunctions in quantum dots, by the Coulomb oscillation.

AB - Transport properties through a quantum dot are examined based on exact diagonal calculations of many-body states, when the Coulomb interaction energy is comparable with one-electron level spacings. The peak positions of Coulomb oscillation show an atomic-like shell structure of one-electron levels, in agreement with recent experimental results. Some peaks of the conductance increase in height with increasing temperature. This anomalous temperature dependence reflects a level spacing as small as 1K and total spin of the ground state. The transport properties through coupled two dots are also investigated. We show that the correlation effect influences the peak heights of the conductance. These phenomena exemplify the observation of many-body wavefunctions in quantum dots, by the Coulomb oscillation.

UR - http://www.scopus.com/inward/record.url?scp=0032326318&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032326318&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0032326318

VL - 205

SP - 199

EP - 202

JO - Physica Status Solidi (B): Basic Research

JF - Physica Status Solidi (B): Basic Research

SN - 0370-1972

IS - 1

ER -