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TT: Fachverband Tiefe Temperaturen

TT 36: Superconductivity: Theory I

TT 36.10: Vortrag

Mittwoch, 20. März 2024, 12:00–12:15, H 3005

Electronic theory for FFLO state in iron-based superconductors: role of spin-orbit coupling and pairing symmetry — •Luka Jibuti and Ilya Eremin — Rurh universität Bochum, Bochum, Germany

We develop an electronic theory of the existence and the mannerisms of the Fulde-Ferrel-Larkin-Ovchinnikov(FFLO) phase in the multiorbital iron-based superconductors. The starting point is the low energy Hamiltonian including realistic description of the spin-orbit coupling, correctly describing the Fermi surfaces of various types of iron-based superconductors. We first address the formation of FFLO state in the in-plane magnetic field in strongly hole- and electron-doped systems such as KFe2As2 and electron intercalated FeSe compounds, respectively. We also show that the formation of the FFLO state is unlikely for the s+- superconducting state in the situation when both electron and hole pockets are present at the Fermi level due to effect of the spin-orbit coupling.