INVESTIGADORES
LAMAS Carlos Alberto
artículos
Título:
Generalized Pomeranchuk instabilities in graphene
Autor/es:
C.A. LAMAS; D.C. CABRA; N. GRANDI
Revista:
PHYSICAL REVIEW B
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2009 vol. 80 p. 75108 - 75118
ISSN:
1098-0121
Resumen:
We study the presence of Pomeranchuk instabilities induced by
interactions on a Fermi liquid description of a graphene layer. Using a
recently developed generalization of Pomeranchuk method we present a
phase diagram in the space of fillings versus on-site and nearest
neighbors interactions. Interestingly, we find that for both
interactions being repulsive an instability region exists near the Van
Hove filling, in agreement with earlier theoretical work. In contrast,
near half filling, the Fermi liquid behavior appears to be stable, in
agreement with theoretical results and experimental findings using
ARPES. The method allows for a description of the complete phase diagram
for arbitrary filling.