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 publicationLOW TEMPERATURE PHYSICS
Subtitle of host publication24th International Conference on Low Temperature Physics - LT24
Pages1380-1381
Number of pages2
DOIs
Publication statusPublished - 2006 Dec 1
EventLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States
Duration: 2006 Aug 102006 Oct 17

Publication series

NameAIP Conference Proceedings
Volume850
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

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

Keywords

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

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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