• 文献标题:   Detection of valley currents in graphene nanoribbons
  • 文献类型:   Article
  • 作  者:   CHAN KS
  • 作者关键词:   valleytronic, graphene, nanostructure, quantum transport
  • 出版物名称:   PHYSICS LETTERS A
  • ISSN:   0375-9601 EI 1873-2429
  • 通讯作者地址:   City Univ Hong Kong
  • 被引频次:   1
  • DOI:   10.1016/j.physleta.2017.12.049
  • 出版年:   2018

▎ 摘  要

There are two valleys in the band structure of graphene zigzag ribbons, which can be used to construct valleytronic devices. We studied the use of a T junction formed by an armchair ribbon and a zigzag ribbon to detect the valley-dependent currents in a zigzag graphene ribbon. A current flowing in a zigzag ribbon is divided by the T junction into the zigzag and armchair leads and this separation process is valley dependent. By measuring the currents in the two outgoing leads, the valley-dependent currents in the incoming lead can be determined. The method does not require superconducting or magnetic elements as in other approaches and thus will be useful in the development of valleytronic devices. (C) 2018 Elsevier B.V. All rights reserved.