Speaker
Francisco Borges
(Perimeter Institute)
Description
To describe the full universal low-energy physics of metals, it is necessary to include all gapless modes around the Fermi surface. In this talk, we study the non-Fermi liquid state that arises at the antiferromagnetic quantum critical point in two space dimensions through a novel field-theoretic functional renormalization group scheme. In this theory, critical spin fluctuations destroy the coherence of single-particle states close to strongly interacting points on the Fermi surface and at the same time, they provide the attractive glue that results in pairing instability. The interplay between these pair-breaking and pair-forming effects controls the quasi-universal pathway from the non-Fermi liquid state to the superconductive state.
External references
- 22090068
- 48b41e46-3ffd-403d-a175-2531e41e6e90
- 4a5d0fe9-dfd8-4870-a553-11cee7af3e7f
