Speaker
Demetrio Vilardi
(Max Planck Institute for Solid State Research)
Description
We analyze the interplay of fluctuating antiferromagnetism and pairing in the two dimensional Hubbard model with a moderate repulsive interaction. In particular, we present a gauge theory description for fluctuations where the stiffnesses are computed in the coexisting phase from renormalization mean-field equations via the functional renormalization group (fRG).
We show a sizable doping regime with robust pairing coexisting with Néel or incommensurate antiferromagnetism. The fluctuations suppress any magnetic order at finite temperature while the Kosterlitz-Thouless critical temperature for pairing remains finite.
Primary authors
Demetrio Vilardi
(Max Planck Institute for Solid State Research)
Pietro Maria Bonetti
(MSFK)
