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

52 Citations (Scopus)

Abstract

Renormalization group method was used to calculate the tunneling conductance around the singlet-triplet crossover region through a quantum dot system with two orbitals. The redistribution of the two electrons in the lower energy orbital to gain Hund's coupling energy was studied. Analysis suggested that the singlet-triplet peaks in the density of states cross at the Fermi energy of the leads. Good agreement between the calculated and experimental results depicted continuous transition and large value of conductance around the singlet-triplet degeneracy at finite temperatures.

Original languageEnglish
Article number216803
Pages (from-to)2168031-2168034
Number of pages4
JournalPhysical review letters
Volume87
Issue number21
Publication statusPublished - 2001 Nov 19
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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