Three-Orbital Kondo Effect in Single Quantum Dot System with Plural Electrons

• Kita Tomoko

  Department of Applied Physics, Osaka University

• Sakano Rui

  Department of Applied Physics, Osaka University

• Ohashi Takuma

  Department of Physics, Osaka University

• Suga Sei-ichiro

  Department of Applied Physics, Osaka University

抄録

We study the Kondo effect and related transport properties in orbitally degenerate vertical quantum dot systems with plural electrons. Applying the non-crossing approximation to the three-orbital Anderson impurity model with the finite Coulomb interaction and Hund-coupling, we investigate the magnetic-field dependence of the conductance and thermopower. We also introduce an additional orbital splitting to take account of the realistic many-body effect in the vertical quantum dot system. It is clarified how the three-orbital Kondo effect influences the transport properties via the modulation of the Kondo temperature and unitary limit of transport quantities due to the change of the symmetry in the system.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 77 (9), 094707-094707, 2008

  一般社団法人 日本物理学会

キーワード

• quantum dot
• Kondo effect
• orbital degrees of freedom
• thermopower
• non-crossing approximation

詳細情報

• CRID: 1390282679174116480
• NII論文ID: 130005437097
• NII論文ID: 110006933492
• NII論文ID: 210000107428
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.77.094707
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 9646552
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9646552
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.77.094707
• 本文言語コード: en
• データソース種別:
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