Possible Field-Temperature Phase Diagrams of Two-Band Superconductors with Paramagnetic Pair-Breaking

Abstract

Possible field-temperature superconducting (SC) phase diagrams in two-band quasi-two-dimensional materials with a strong paramagnetic pair-breaking (PPB) are considered theoretically. Attention is paid to the case under a magnetic field $perpendicular$ to the SC layers and to essential differences from the counterpart in the ordinary single-band material. It is found by examining the $H_{c2}(T)$ curve and the vortex lattices to be realized close to $H_{c2}$ that a PPB-induced SC phase with a spatial modulation parallel to the field tends to occur more easily than in the single-band case, and that a crisscrossing vortex lattice proposed previously can occur in place of the conventional Fulde-Ferrell-Larkin-Ovchinnikov state within a parameter range. The relevance of the obtained results to FeSe and other iron-based superconductors is discussed.

arXiv comment21 pages, 3 figures

References in corpus (17)

• Fulde-Ferrell-Larkin-Ovchinnikov Superconducting State in CeCoIn5
• Field-induced superconducting phase of FeSe in the BCS-BEC cross-over
• Evidence of Andreev bound states as a hallmark of the FFLO phase in $\kappa$-(BEDT-TTF)${}_2$Cu(NCS)${}_2$
• Fulde-Ferrell-Larkin-Ovchinnikov state in a perpendicular field of quasi two-dimensional CeCoIn5
• Effects of Pauli paramagnetism on superconducting vortex phase diagram in strong fields
• Anisotropic upper critical field and a possible Fulde-Ferrel-Larkin-Ovchinnikov state in a stoichiometric pnictide superconductor LiFeAs
• Pauli-Limited Multiband Superconductivity in KFe2As2
• Switching of magnetic domains reveals evidence for spatially inhomogeneous superconductivity
• A Two-dimensional Superconductor in a Tilted Magnetic Field - new states with finite Cooper-pair momentum
• Vortex Lattice Structure of Fulde-Ferrell-Larkin-Ovchinnikov Superconductors
• High field superconducting phase diagrams including Fulde-Ferrell-Larkin-Ovchinnikov vortex states
• Fulde-Ferrell-Larkin-Ovchinnikov States in Two-Band Superconductors
• Impurity-induced broadening of the transition to a Fulde-Ferrell-Larkin-Ovchinnikov phase
• Antiferromagnetic Order oriented by Fulde-Ferrell-Larkin-Ovchinnikov Superconducting Order
• Anomalous doping effect on the superconducting state in CeCoIn${}_5$ at high magnetic fields
• Upper critical magnetic field in K0.83Fe1.83Se2 and Eu0.5K0.5Fe2As2 single crystals
• Comment on "Spatial line nodes and fractional vortex pairs in the Fulde-Ferrell-Larkin-Ovchinnikov phase"

Cited by in corpus (7)

• Evidence for an FFLO state with segmented vortices in the BCS-BEC-crossover superconductor FeSe
• Quantum FFLO state in clean layered superconductors
• Fluctuation Conductivity and Vortex State in Superconductor with Strong Paramagnetic Pair Breaking
• Superconducting meron phase in locally noncentrosymmetric superconductors
• Interplay between orbital-quantization effects and the Fulde-Ferrell-Larkin-Ovchinnikov instability in multiple-band layered superconductors
• Vortex Lattice Melting Line in Superconductors with Paramagnetic Pair-Breaking
• Microscopic evidence for Fulde-Ferrel-Larkin-Ovchinnikov state and multiband effects in KFe${}_2$As${}_2$