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Mardi 18 novembre 2008 — 14:00

Pomeranchuk Instabilities in Lattice Systems

Daniel Cabra (LPT Strasbourg)

par Pierre Pujol - 18 novembre 2008

We describe a recently developed procedure for detecting Fermi liquid instabilities which is an extension of the analysis of Pomeranchuk to two-dimensional lattice systems. The method is very general and straightforward to apply, thus providing a powerful tool for the search of exotic phases. Applications to a lattice electron model with interactions leading to $s$ and $d$-wave instabilities are discussed. We finally apply the method to 2D graphene with long range interactions.