Point-Contact Conductance in Asymmetric Chalker–Coddington Network Model

• Kobayashi Koji

  Department of Physics, Sophia University

• Ohtsuki Tomi

  Department of Physics, Sophia University

• Slevin Keith

  Department of Physics, Osaka University

Abstract

We study the transport properties of disordered two-dimensional electron systems with a perfectly conducting channel. We introduce an asymmetric Chalker–Coddington network model and numerically investigate the point-contact conductance. We find that the behavior of the conductance in this model is completely different from that in the symmetric model. Even in the limit of a large distance between the contacts, we find a broad distribution of conductance and a non-trivial power law dependence of the averaged conductance on the system width. Our results are applicable to systems such as zigzag graphene nano-ribbons where the numbers of left- and right-going channels are different.

Journal

• Journal of the Physical Society of Japan

  Journal of the Physical Society of Japan 78 (8), 084708-084708, 2009

  THE PHYSICAL SOCIETY OF JAPAN

Keywords

• point-contact conductance
• perfectly conducting channel
• network model
• Chalker–Coddington model
• graphene

Details

• CRID: 1390001204197179136
• NII Article ID: 130005437796
• NII Article ID: 210000107936
• NII Book ID: AA00704814
• DOI: 10.1143/jpsj.78.084708
• ISSN: 13474073
• ISSN: 00319015
• NDL BIB ID: 10317288
• Web Site: http://digital-archives.sophia.ac.jp/repository/view/repository/00000014444
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10317288
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.78.084708
• Text Lang: en
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed