Controllability of ferromagnetism in graphene
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AbstractWe systematically study magnetic correlations in graphene within Hubbard model on a honeycomb lattice by using quantum Monte Carlo simulations. In the filling region below the Van Hove singularity, the system shows a short-range ferromagnetic correlation, which is slightly strengthened by the on-site Coulomb interaction and markedly by the next-nearest-neighbor hopping integral. The ferromagnetic properties depend on the electron filling strongly, which may be manipulated by the electric gate. Due to its resultant controllability of ferromagnetism, graphene-based samples may facilitate the development of many applications. (c) 2010 American Institute of Physics. [doi:10.1063/1.3485059]
All Author(s) ListMa TX, Hu FM, Huang ZB, Lin HQ
Journal nameApplied Physics Letters
Volume Number97
Issue Number11
PublisherAIP Publishing
LanguagesEnglish-United Kingdom
Keywordsferromagnetic materials; graphene; Hubbard model; magnetic semiconductors; Monte Carlo methods; narrow band gap semiconductors
Web of Science Subject CategoriesPhysics; Physics, Applied; PHYSICS, APPLIED

Last updated on 2021-11-01 at 23:40