| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Kondo and Coulomb Interaction Effects in Spin-Polarized Transport through Double Quantum Dots |
CHEN Jia-Feng, WU Shao-Quan, HOU Tao, ZHAO Guo-Ping |
| College of Physics and Electronic Engineering, Sichuan NormalUniversity, Chengdu 610068 |
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| Cite this article: |
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CHEN Jia-Feng, WU Shao-Quan, HOU Tao et al 2010 Chin. Phys. Lett. 27 047201 |
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Abstract 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. We then clarify relevant underlying physics of this problem.
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| Keywords:
72.15.Qm
73.23.Hk
73.63.Kv
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Received: 31 December 2009
Published: 27 March 2010
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| PACS: |
72.15.Qm
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(Scattering mechanisms and Kondo effect)
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73.23.Hk
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(Coulomb blockade; single-electron tunneling)
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73.63.Kv
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(Quantum dots)
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