SKM 2023 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 57: Poster: Superconductivity I

TT 57.14: Poster

Donnerstag, 30. März 2023, 15:00–18:00, P2/OG2

Eliashberg theory calculations for magnetically mediated superconductivity — •Ran Tao and Malte Grosche — Department of Physics, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom

Computational modelling for realistic material parameters can speed up the search for new unconventional superconductors.

We have implemented calculations of the superconducting transition temperature in Eliashberg theory for spin fluctuation mediated superconductivity and validated them by reproducing previously published results in simple systems (e.g. [1]). Next, our code has been extended to a minimal model for iron-based superconductors, namely a 2D compensated metal with varying Fermi surface volume and interaction strength. Developing this approach further in the spirit of the UppSC code (e.g. [2]), numerical calculations are used to investigate the effects of applied field and to assist the discovery of new unconventional superconductors by surveying large numbers of candidate materials.
[1] P. Monthoux and G. G. Lonzarich, Phys. Rev. B 59, 14598 (1999)
[2] A. Aperis, P. Maldonado, and P. M. Oppeneer, Phys. Rev. B 92, 054516 (2015)