Kondo and Coulomb Interaction Effects in Spin-Polarized Transport through Double Quantum Dots

By means of the slave-boson mean-field approximation, we theoretically investigate the Kondo and Coulomb interaction effects in spin-polarized transport through two coupled quantum dots coupled to two ferromagnetic leads by the Anderson Hamiltonian. The density of states is calculated in the Kondo r...

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Bibliographic Details
Published inChinese physics letters Vol. 27; no. 4; pp. 200 - 203
Main Author 陈嘉峰 吴绍全 侯涛 赵国平
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.04.2010
Subjects
Alignment
Approximation
Coulomb friction
Density of states
Ferromagnetism
Mathematical analysis
Quantum dots
Transport
双量子点
平均场近似
库仑相互作用
态密度
极化效应
玻色子
自旋极化输运
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Summary:By means of the slave-boson mean-field approximation, we theoretically investigate the Kondo and Coulomb interaction effects in spin-polarized transport through two coupled quantum dots coupled to two ferromagnetic leads by the Anderson Hamiltonian. The density of states is calculated in the Kondo regime for the effect of the interdot Coulomb repulsion with both parallel and antiparallel lead-polarization alignments. Our results reveal that the interdot Coulomb interaction between quantum dots greatly influence the density of states of the dots.
Bibliography:11-1959/O4
O53
O471.1
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ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/27/4/047201