Fermi Surface Renormalization Group

Tetsuo Ogawa, Hideaki Maebashi, Hiroshi Kohno +1 more

Walter Metzner

Jun‐ichiro Kishine, Kenji Yonemitsu

Two-loop renormalization-group (RG) analysis for a two-dimensional electron system with a partially flat Fermi surface has been carried out. We found that the RG flow of the quasiparticle weight depends on the location of the electron wave number $\mathit{k}$ on the Fermi surface due to the kinematical restriction to the logarithmically divergent processes in the flat regions of the Fermi surface.

R. Shankar

The low energy manifold for fermions at finite density is the Fermi surface. I describe renormalization group (RG) in which modes encountered on approaching the Fermi surface are systematically integrated out. The fixed point is described by strictly marginal coupling functions identified as the Landau parameters and marginally relevant coupling functions describing the BCS instability in various angular momentum channels.

Tom Lancaster, Stephen J. Blundell

Peter Kopietz, Lorenz Bartosch, Florian Schütz