Spin-filter effect by introducing an edge vacancy on armchair graphene nanoribbons with oxygen termination

Katsuya Yabusaki, Kenji Sasaoka, Kei Noda, Yuji Awano

Research output: Contribution to journalArticle

Abstract

We studied the spin transport properties of an oxygen-terminated armchair graphene nanoribbon (O-AGNR) with a single edge vacancy via an ab-initio calculation based on density functional theory combined with the nonequilibrium Green's function technique. We found that spin-filtering occurs regardless of the ribbon width by introducing an edge vacancy on one edge side of the O-AGNR because the four energy bands mainly consisted of the oxygen p orbital, such that the up-spin states were localized on one edge side and the down-spin states were on the other edge side. Moreover, we showed that the absolute value of spin-filtering efficiency reached ∼1.00 at certain values of the chemical potential; additionally, the direction of spin polarization can be switched by controlling the chemical potential. These results suggest that O-AGNRs have potential applications in spintronics devices.

Original languageEnglish
Article number045001
JournalJapanese journal of applied physics
Volume58
Issue number4
DOIs
Publication statusPublished - 2019 Jan 1

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Nanoribbons
Graphene
Vacancies
graphene
Chemical potential
filters
Oxygen
oxygen
Magnetoelectronics
Spin polarization
Green's function
Band structure
Transport properties
Density functional theory
ribbons
energy bands
Green's functions
transport properties
density functional theory
orbitals

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Spin-filter effect by introducing an edge vacancy on armchair graphene nanoribbons with oxygen termination. / Yabusaki, Katsuya; Sasaoka, Kenji; Noda, Kei; Awano, Yuji.

In: Japanese journal of applied physics, Vol. 58, No. 4, 045001, 01.01.2019.

Research output: Contribution to journalArticle

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