Competition between intraband and interband pairing

Date: 27 February 2018

Venue: University of Antwerp - Campus Groenenborger - Room U.244 - Groeneborgerlaan 171 - 2020 Antwerpen (route: UAntwerpen, Campus Groenenborger)

Time: 4:00 PM - 5:00 PM

Organization / co-organization: Condensed Matter Theory

Short description: Condensed Matter Theory seminar presented by Alfredo Vargas

We show that there is coexistence of intraband and interband pair formation in a two-band superconductor. Both pairing mechanisms compete for the available quantum states in the energy window where the interaction is sizeable and present a higher Tc than systems without crosspairing. There are two regimes of coexistence: intraband dominated and interband dominated regime. These two regimes are delimited by a gapless state which is found as a gap node in many iron based superconductors. We also obtain the spectral features of the density and gap ngerprints for the crossparing in monolayer FeSe.