Nov 24 – 27, 2022
Karlsruhe Institute of Technology
Europe/Berlin timezone

Quantum critical Eliashberg theory in a finite dimensional SYK model

Nov 25, 2022, 9:45 AM
15m
401 (KIT Campus North)

401

KIT Campus North

KIT Campus map: https://www.kit.edu/campusplan/ Building: 401 Room: 410 Address: Leopoldshafener Allee, Building 401 Coordinates: 49.09422, 8.43069

Speaker

Veronika Stangier (KITI)

Description

We present a model of superconductivity in a higher dimensional generalization of the Sachdev-Ye-Kitaev model. In the normal state this model features a critical phase in (1+1) dimensions and a quantum phase transition in (2+1) dimensions. For (2+1) dimensions the superconductivity emerges around the quantum critical point. We derive the Eliashberg equations of superconductivity from the saddle point equations of the field theory in the limit of a large number of degrees of freedom. Finally we analyse the effect of pair-breaking and tuning of the boson to fermion flavour ratio on the superconducting phase.

Category Solid State (Theory)

Primary authors

Veronika Stangier (KITI) Jörg Schmalian (KIT)

Presentation materials