Density waves and Cooper pairing on the honeycomb lattice

Details Density waves and Cooper pairing on the honeycomb lattice Density waves and Cooper pairing on the honeycomb lattice

2007-11-08

arxiv.org/abs/0711.1259v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.100.146404

Motivated by the surge in research activities on graphene, we investigate instabilities of electrons on the honeycomb lattice, interacting by onsite and nearest-neighbor terms, using a renormalization group scheme. Near half band-filling, critical minimal interaction strengths are required for instabilities toward antiferromagnetic or charge-density wave order. Away from half filling, f-wave triplet pairing and d+id singlet pairing instabilities are found to emerge out of density-wave regimes.

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