Perturbative Approach to Coulomb Interaction in Double Quantum Dot Systems(Condensed matter : electronic structure and electrical, magnetic, and optical properties)
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概要
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In this paper, we study the effect of Coulomb interaction on current in double quantum dot systems by a perturbative approach. Terms of up to the second-order in the Coulomb interaction are taken into consideration. Under current conservation, zero-bias conductance, the conductance under finite bias and its temperature dependence are investigated. These physical quantities in the absence and presence of Coulomb interaction are compared, and the effect of Coulomb scattering on electron conduction is clarified. For strong interaction, our numerical results are compared with those obtained by other methods. The characteristics and limitations of this perturbative approach are discussed. It is concluded that the delicate inter-dot coupling effect on zero-bias conductance is not well reflected by our perturbative approach.
- 社団法人日本物理学会の論文
- 2007-10-15
著者
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川口 聡
公立はこだて未来大学複雑系科学科
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Kawaguchi Satoshi
Department Of Complex Systems School Of Systems Information Science Future University
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Kawaguchi Satoshi
Department Of Bioscience And Biotechnology Graduate School Of Natural Science And Technology Okayama
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Kawaguchi Satoshi
Department Of Orthopaedic Surgery Asahikawa-kosei General Hospital
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Kawaguchi Satoshi
Department of Orthopaedic Surgery, Sapporo Medical University School of Medicine
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KAWAGUCHI Satoshi
Department of Complex Systems, School of Systems Information Science, Future University-Hakodate
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KAWAGUCHI Satoshi
Laboratory for Advanced Brain Signal Processing, Brain Science Institute, RIKEN
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Kawaguchi Satoshi
Department of Complex and Intelligent Systems, School of Systems Information Science, Future University Hakodate, Hakodate, Hokkaido 041-8655, Japan
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KAWAGUCHI Satoshi
Laboratory for Advanced Brain Signal Processing Brain Science Institute, RIKEN
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