Strain-tuning of vacancy-induced magnetism in graphene nanoribbons

Midtvedt, Daniel; Croy, Alexander

doi:10.1088/0953-8984/28/4/045302

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Strain-tuning of vacancy-induced magnetism in graphene nanoribbons

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Midtvedt, Daniel
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Croy, Alexander
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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http://iopscience.iop.org/article/10.1088/0953-8984/28/4/045302/meta
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Midtvedt, D., & Croy, A. (2016). Strain-tuning of vacancy-induced magnetism in graphene nanoribbons. Journal of Physics: Condensed Matter, 28(4): 045302. doi:10.1088/0953-8984/28/4/045302.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-B5B1-F

Abstract

Vacancies in graphene lead to the appearance of localized electronic states with non-vanishing spin moments. Using a mean-field Hubbard model and an effective double-quantum dot description we investigate the influence of strain on localization and magnetic properties of the vacancy-induced states in semiconducting armchair nanoribbons. We find that the exchange splitting of a single vacancy and the singlet-triplet splitting for two vacancies can be widely tuned by applying uniaxial strain, which is crucial for spintronic applications.