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

Abstract

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.

Journal

• Journal of the Physical Society of Japan

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

  THE PHYSICAL SOCIETY OF JAPAN

Keywords

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

Details

• CRID: 1390282679174719744
• NII Article ID: 130005436247
• NII Article ID: 110006983730
• NII Article ID: 210000107512
• NII Book ID: AA00704814
• DOI: 10.1143/jpsj.77.113708
• ISSN: 13474073
• ISSN: 00319015
• NDL BIB ID: 9706136
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9706136
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.77.113708
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed