Unconventional Superconductivity in Iron-Based Superconductors in a Three-Band Model
D. Crivelli and A. Ptok
Institute of Physics, University of Silesia, 40-007 Katowice, Poland
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Iron-based superconductors exhibit features of systems where the Fulde-Ferrell-Larkin-Ovchinnikov phase, a superconducting state with non-zero total momentum of the Cooper pairs, is actively sought. Experimental and theoretical evidence points strongly to the Fulde-Ferrell-Larkin-Ovchinnikov phase in these materials above the Pauli limit. In this article we discuss the ground state of iron-based superconductors near the critical magnetic field and the full h-T phase diagram for pnictides in case of intra-band pairing, in a three-band model with s± symmetry.

DOI: 10.12693/APhysPolA.126.A-16
PACS numbers: 74.20.Rp, 74.70.Xa, 74.25.Dw