Tunneling through a quantum dot in local spin singlet-triplet crossover region with kondo effect

Wataru Izumida, Osamu Sakai, Seigo Tarucha

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Tunneling conductance through a quantum dot is calculated around the local spin singlet-triplet crossover region including the Kondo effect. The calculation is carried out using the numerical renormalization group method. When the potential on the dot deepens, two electrons filling a lower energy orbital redistribute to gain Hund’s coupling energy. This redistribution induces a bump in the conductance between the Coulomb peaks. The Kondo temperature on the bump is high due to the fluctuation on the singlet-triplet crossover region. The behaviors agree well with recent experiment.

Original languageEnglish
Pages (from-to)216803-1-216803-4
JournalPhysical review letters
Volume87
Issue number21
DOIs
Publication statusPublished - 2001 Nov 19
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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