Electromechanical switch in metallic graphene nanoribbons via twisting

Hong Li, Nabil Al-Aqtash, Lu Wang, Rui Qin, Qihang Liu, Jiaxin Zheng, Wai Ning Mei, R. F. Sabirianov, Zhengxiang Gao, Jing Lu

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

We imposed screwing operation to a metallic ferromagnetic zigzag-edged graphene nanoribbon (ZGNR) with a narrow width and a finite length, and the polarized charge transport is investigated by using Nonequilibrium Green's function in combination with density functional theory. The current are nearly completely suppressed when the ZGNRs are overturned. Inspiringly, this metal-to-semiconductor transition tuned by screwing operation is reversible. Hence our investigation brings forward a novel electromechanical switch, and such a switch is equivalent to a spin valve without resort to an external magnetic field.

Original languageEnglish (US)
Pages (from-to)2021-2026
Number of pages6
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume44
Issue number10
DOIs
Publication statusPublished - Jul 1 2012

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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