Detection of valley currents in graphene nanoribbons

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

2 Scopus Citations
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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)534-539
Journal / PublicationPhysics Letters, Section A: General, Atomic and Solid State Physics
Volume382
Issue number7
Online published2 Jan 2018
Publication statusPublished - 20 Feb 2018

Abstract

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.

Research Area(s)

  • Graphene, Nanostructures, Quantum transport, Valleytronics