Modified Perturbation Theory Applied to Kondo-Type Transport through a Quantum Dot under a Magnetic Field.

• Takagi Osamu

  Department of Physics, Saitama University, Urawa, Saitama 338–8570

• Saso Tetsuro

  Department of Physics, Saitama University, Urawa, Saitama 338–8570

抄録

Linear conductance through a quantum dot is calculated under a finite magnetic field using the modified perturbation theory. The method is based on the second-order perturbation theory with respect to the Coulomb repulsion, but the self-energy is modified to reproduce the correct atomic limit and to fulfill the Friedel sum rule exactly. Although this method is applicable only to zero temperature in a strict sense, it is approximately extended to finite temperatures. It is found that the conductance near electron-hole symmetry is suppressed by the application of the magnetic field at low temperatures. Positive magnetoconductance is observed in the case of large electron-hole asymmetry.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 68 (9), 2894-2897, 1999

  一般社団法人 日本物理学会

キーワード

• quantum dot
• Anderson model
• Kondo effect
• perturbation theory
• conductance
• magnetic field

詳細情報

• CRID: 1390001204182426112
• NII論文ID: 210000101831
• NII論文ID: 110001978771
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.68.2894
• BIBCODE: 1999JPSJ...68.2894T
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 4904990
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4904990
• Web Site: http://journals.jps.jp/doi/pdf/10.1143/JPSJ.68.2894
• 本文言語コード: en
• データソース種別:
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  • NDL
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