Interaction effects in single layer and multi-layer graphene |
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| Authors: | F Guinea A H Castro Neto N MR Peres |
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| Institution: | (1) Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, 28049 Madrid, Spain;(2) Department of Physics, Boston University, 590 Commonwealth Av., Boston, MA 02115, USA;(3) Center of Physics and Departamento de Física, Universidade do Minho, 4710-057 Braga, Portugal |
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| Abstract: | We discuss the excitation spectrum, electronic susceptibilities,
and possible electronic instabilities in graphene and graphene stacks. The
corrections due interactions of Landau levels in graphene are analyzed. At
low dopings, and for
sufficiently low couplings, single layer graphene is stable against
ferromagnetism. On the other hand, a graphene bilayer, and
infinite graphite, are unstable towards ferromagnetism and
antiferromagnetism. |
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