Out-of-equilibrium transport phenomena through a quantum dot in a magnetic field

被引：29

作者：

Fujii, T ^{[1
]}

Ueda, K ^{[1
]}

机构：

[1] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2005年 / 74卷 / 01期

关键词：

nonequilibrium; Kondo effect; quantum dot; magnetic field;

D O I：

10.1143/JPSJ.74.127

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate nonequilibrium transport through a dot in a finite magnetic field in a weak correlation regime by using the self-consistent perturbation theory in the Keldysh formalism. Separation of the density of states between the up and down spins becomes smaller gradually and ends up with the Zeeman energy as increasing the bias voltage. Concerning the differential conductance the zero-bias peak splits into two peaks when magnetic field is increased. The critical field for the splitting decreases as the Coulomb interaction is increased.

引用

页码：127 / 135

页数：9

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