Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-07-31
New J. Phys. 10 (2008) 113009
Physics
Condensed Matter
Strongly Correlated Electrons
7 pages, 5 figures
Scientific paper
10.1088/1367-2630/10/11/113009
The density of states of graphene has Van Hove singularities that can be reached by chemical doping and have already been explored in photoemission experiments. We show that in the presence of Coulomb interactions the system at the Van Hove filling is likely to undergo a Pomeranchuk instability breaking the lattice point group symmetry. In the presence of an on--site Hubbard interaction the system is also unstable towards ferromagnetism. We explore the competition of the two instabilities and build the phase diagram. We also suggest that, for doping levels where the trigonal warping is noticeable, the Fermi liquid state in graphene can be stable up to zero temperature avoiding the Kohn--Luttinger mechanism and providing an example of two dimensional Fermi liquid at zero temperature.
Valenzuela Belén
Vozmediano Maria A. H.
No associations
LandOfFree
Pomeranchuk instability in doped graphene does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Pomeranchuk instability in doped graphene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pomeranchuk instability in doped graphene will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-364027