INVESTIGADORES
CABRA Daniel Carlos
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:
Año: 2009 vol. 80 p. 75108 - 75117
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.