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

被引：49

作者：

Izumida, W ^{[1
]}

Sakai, O

Tarucha, S

机构：

[1] NTT Atsugi R&D Ctr, JST, ERATO, Mesoscop Correlat Project, Atsugi, Kanagawa 2430198, Japan

[2] Tokyo Metropolitan Univ, Dept Phys, Tokyo 1920397, Japan

[3] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

[4] NTT Basic Res Labs, Atsugi, Kanagawa 2430129, Japan

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.87.216803

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页码：216803 / 1

页数：4

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