Enhanced Conductance Fluctuation due to the Zero-Conductance Fano Resonances in the Quantum Point Contact on Graphene

• Wakabayashi Katsunori

  Department of Quantum Matter, AdSM, Hiroshima University PRESTO, Japan Science and Technology Agency (JST)

• Sigrist Manfred

  Theoretische Physik, ETH-Hönggerberg

抄録

The electronic transport properties in graphene quantum point contacts are numerically studied. The constriction of the quantum point contact induces the zero-conductance Fano resonances in the low-energy single channel transport region near the Dirac point, i.e., perfect reflection. Randomly distributed impurities which alter the resonance energies cause large conductance fluctuation comparable to the ensemble averaged dimensionless conductance. Our results identify a further intriguing effect of impurity scattering in the electronic transport properites of graphene.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 77 (11), 113708-113708, 2008

  一般社団法人 日本物理学会

キーワード

• graphene
• nanographene
• nanoribbon
• edge states
• conductance fluctuation
• zero-conductance anti-resonance
• Fano resonance
• impurity

詳細情報

• CRID: 1390282679174719744
• NII論文ID: 130005436247
• NII論文ID: 110006983730
• NII論文ID: 210000107512
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.77.113708
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 9706136
• Web Site: http://id.ndl.go.jp/bib/9706136
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9706136
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.77.113708
• 本文言語コード: en
• データソース種別:
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  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可