Monovacancy-induced magnetism in graphene bilayers

Details Monovacancy-induced magnetism in graphene bilayers Monovacancy-induced magnetism in graphene bilayers

2008-05-15

arxiv.org/abs/0805.2213v1

Physics: Condensed Matter v.20, p.235220 (2008)

Physics

Condensed Matter

Other Condensed Matter

14 pages, 1 table and 4 figures

Scientific paper

10.1088/0953-8984/20/23/235220

Vacancy-induced magnetism in graphene bilayers is investigated using spin-polarized density functional theory calculations. One of two graphene layers has a monovacancy. Two atomic configurations for bilayers are considered with respect to the position of the monovacancy. We find that spin magnetic moments localized at the vacancy site decreases by ~10 % for our two configurations, compared with the graphene monolayer with a monovacancy. The reduction of the spin magnetic moment in the graphene bilayers is attributed to the interlayer charge transfer from the adjacent layer to the layer with the monovacancy, compensating for spin magnetic moments originating from quasilocalized defect state.

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