Topological zero-line modes in folded bilayer graphene

Tao Hou, Guanghui Cheng, Wang Kong Tse, Changgan Zeng, Zhenhua Qiao

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

We theoretically investigate a folded bilayer graphene structure as an experimentally realizable platform to produce the one-dimensional topological zero-line modes. We demonstrate that the folded bilayer graphene under an external gate potential enables tunable topologically conducting channels to be formed in the folded region, and that a perpendicular magnetic field can be used to enhance the conducting when external impurities are present. We also show experimentally that our proposed folded bilayer graphene structure can be fabricated in a controllable manner. Our proposed system greatly simplifies the technical difficulty in the original proposal by considering a planar bilayer graphene (i.e., precisely manipulating the alignment between vertical and lateral gates on bilayer graphene), laying out a strategy in designing practical low-power electronics by utilizing the gate-induced topological conducting channels.

Original languageEnglish
Article number245417
JournalPhysical Review B
Volume98
Issue number24
DOIs
Publication statusPublished - 2018 Dec 19
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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