Controllability of ferromagnetism in graphene
Materials Science
2010-09-16 v2 Strongly Correlated Electrons
Abstract
We 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.
Keywords
Cite
@article{arxiv.0912.0094,
title = {Controllability of ferromagnetism in graphene},
author = {Tianxing Ma and Feiming Hu and Zhongbing Huang and Hai-Qing Lin},
journal= {arXiv preprint arXiv:0912.0094},
year = {2010}
}
Comments
Published version in Applied Physics Letters