Numerical studies of Kondo effect in multilevel quantum dots

Tomoya Sato, Mikio Eto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We theoretically study the Kondo effect in quantum dots with two orbitals and spin 1/2, using the numerical renormalization group method. The Kondo temperature TK and conductance are evaluated, changing the energy difference Δ between the orbitals. TK is maximal around Δ = 0 and decreases with increasing Δ. The conductance shows an analogous behavior at a finite temperature, in accordance with the experimental results. We observe a universal curve for the conductance as a function of T/T K, irrespectively of Δ, but not for the partial conductance through one of the orbitals.

Original languageEnglish
Title of host publicationAIP Conference Proceedings
Pages1380-1381
Number of pages2
Volume850
DOIs
Publication statusPublished - 2006
EventLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States
Duration: 2006 Aug 102006 Oct 17

Other

OtherLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
CountryUnited States
CityOrlando, FL
Period06/8/1006/10/17

Fingerprint

Kondo effect
quantum dots
orbitals
renormalization group methods
temperature
curves
energy

Keywords

  • Kondo effect
  • NRG
  • Numerical renormalization group
  • Quantum dot
  • SU(4)Kondo effect

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Sato, T., & Eto, M. (2006). Numerical studies of Kondo effect in multilevel quantum dots. In AIP Conference Proceedings (Vol. 850, pp. 1380-1381) https://doi.org/10.1063/1.2355220

Numerical studies of Kondo effect in multilevel quantum dots. / Sato, Tomoya; Eto, Mikio.

AIP Conference Proceedings. Vol. 850 2006. p. 1380-1381.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Sato, T & Eto, M 2006, Numerical studies of Kondo effect in multilevel quantum dots. in AIP Conference Proceedings. vol. 850, pp. 1380-1381, LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24, Orlando, FL, United States, 06/8/10. https://doi.org/10.1063/1.2355220
Sato T, Eto M. Numerical studies of Kondo effect in multilevel quantum dots. In AIP Conference Proceedings. Vol. 850. 2006. p. 1380-1381 https://doi.org/10.1063/1.2355220
Sato, Tomoya ; Eto, Mikio. / Numerical studies of Kondo effect in multilevel quantum dots. AIP Conference Proceedings. Vol. 850 2006. pp. 1380-1381
@inproceedings{4803a37b9efd4a508a40cdee87db508f,
title = "Numerical studies of Kondo effect in multilevel quantum dots",
abstract = "We theoretically study the Kondo effect in quantum dots with two orbitals and spin 1/2, using the numerical renormalization group method. The Kondo temperature TK and conductance are evaluated, changing the energy difference Δ between the orbitals. TK is maximal around Δ = 0 and decreases with increasing Δ. The conductance shows an analogous behavior at a finite temperature, in accordance with the experimental results. We observe a universal curve for the conductance as a function of T/T K, irrespectively of Δ, but not for the partial conductance through one of the orbitals.",
keywords = "Kondo effect, NRG, Numerical renormalization group, Quantum dot, SU(4)Kondo effect",
author = "Tomoya Sato and Mikio Eto",
year = "2006",
doi = "10.1063/1.2355220",
language = "English",
isbn = "0735403473",
volume = "850",
pages = "1380--1381",
booktitle = "AIP Conference Proceedings",

}

TY - GEN

T1 - Numerical studies of Kondo effect in multilevel quantum dots

AU - Sato, Tomoya

AU - Eto, Mikio

PY - 2006

Y1 - 2006

N2 - We theoretically study the Kondo effect in quantum dots with two orbitals and spin 1/2, using the numerical renormalization group method. The Kondo temperature TK and conductance are evaluated, changing the energy difference Δ between the orbitals. TK is maximal around Δ = 0 and decreases with increasing Δ. The conductance shows an analogous behavior at a finite temperature, in accordance with the experimental results. We observe a universal curve for the conductance as a function of T/T K, irrespectively of Δ, but not for the partial conductance through one of the orbitals.

AB - We theoretically study the Kondo effect in quantum dots with two orbitals and spin 1/2, using the numerical renormalization group method. The Kondo temperature TK and conductance are evaluated, changing the energy difference Δ between the orbitals. TK is maximal around Δ = 0 and decreases with increasing Δ. The conductance shows an analogous behavior at a finite temperature, in accordance with the experimental results. We observe a universal curve for the conductance as a function of T/T K, irrespectively of Δ, but not for the partial conductance through one of the orbitals.

KW - Kondo effect

KW - NRG

KW - Numerical renormalization group

KW - Quantum dot

KW - SU(4)Kondo effect

UR - http://www.scopus.com/inward/record.url?scp=33947528432&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33947528432&partnerID=8YFLogxK

U2 - 10.1063/1.2355220

DO - 10.1063/1.2355220

M3 - Conference contribution

AN - SCOPUS:33947528432

SN - 0735403473

SN - 9780735403475

VL - 850

SP - 1380

EP - 1381

BT - AIP Conference Proceedings

ER -