196 research outputs found
Non-Fermi liquid fixed point for an imbalanced gas of fermions in dimensions
We consider a gas of two species of fermions with population imbalance. Using
the renormalization group in dimensions, we show that for
spinless fermions and a fixed point appears at finite attractive
coupling where the quasiparticle residue vanishes, and identify this with the
transition to Larkin--Ovchinnikov--Fulde--Ferrell order (inhomogeneous
superconductivity). When the two species of fermions also carry spin degrees of
freedom we find a fixed point indicating a transition to spin density wave
order.Comment: 4 pages and 4 figure
- …