The role of orbital nesting in the superconductivity of Iron-based Superconductors
arXiv:2107.02825 · doi:10.3390/condmat6030034
Abstract
We analyze the magnetic excitations and the spin-mediated superconductivity in iron-based superconductors within a low-energy model that operates in the band basis but fully incorporates the orbital character of the spin excitations. We show how the orbital selectivity, encoded in our low-energy description, simplifies substantially the analysis and allows for analytical treatments, while retaining all the main features of both spin-excitations and gap functions computed using multiorbital models. Importantly, our analysis unveils the orbital matching between the hole and electron pockets as the key parameter to determine the momentum-dependence and the hierarchy of the superconducting gaps, instead of the Fermi surface matching as in the common nesting scenario.
arXiv comment11 pages, 5 figures. Revised version as published. The revised discussion includes the analysis of the nearly degenerate d-wave pairing symmetry solution beside the dominant s
References in corpus (35)
- Unconventional sign-reversing superconductivity in LaFeAsO_(1-x)F_x
- Unconventional pairing originating from disconnected Fermi surfaces in superconducting LaFeAsOF}
- A Common Thread: the pairing interaction for the unconventional superconductors
- Gap symmetry and structure of Fe-based superconductors
- Near-degeneracy of several pairing channels in multiorbital models for the Fe-pnictides
- Pnictogen height as a possible switch between high-T_c nodeless and low-T_c nodal pairings in the iron based superconductors
- Is LaOFFeAs an electron-phonon superconductor ?
- Electronic structure of quantum materials studied by angle-resolved photoemission spectroscopy
- Preemptive nematic order, pseudogap, and orbital order in the iron pnictides
- Normal-State Spin Dynamics and Temperature-Dependent Spin Resonance Energy in an Optimally Doped Iron Arsenide Superconductor
- As NMR studies of superconducting LaOFFeAs
- Nodal Spin Density Wave and band topology of the FeAs based materials
- Spin fluctuations and superconductivity in a 3D tight-binding model for BaFe2As2
- Using Gap Symmetry and Structure to Reveal the Pairing Mechanism in Fe-based Superconductors
- Phase diagram and Gap anisotropy in Iron-Pnictide Superconductors
- Space group symmetry, spin-orbit coupling and the low energy effective Hamiltonian for iron based superconductors
- Sensitivity of the superconducting state and magnetic susceptibility to key aspects of electronic structure in ferropnictides
- Origin of Gap Anisotropy in Spin Fluctuation Models of the Fe-pnictides
- Orbital-dependent Fermi Surface shrinking as a fingerprint of nematicity in FeSe
- Magnetic interactions in iron superconductors: A review
- Raman-Scattering Detection of Nearly Degenerate -Wave and -Wave Pairing Channels in Iron-Based BaKFeAs and RbFeSe Superconductors
- Nematic Pairing from Orbital Selective Spin Fluctuations in FeSe
- Collective modes in superconductors with competing s- and d-wave interactions
- Anisotropic quasiparticle lifetimes in Fe-based superconductors
- Role of vertex corrections in the matrix formulation of the random phase approximation for the multiorbital Hubbard model
- Probing the pairing interaction and multiple Bardasis-Schrieffer modes using Raman spectroscopy
- Spin-Driven Nematic Instability of the Multi-Orbital Hubbard Model: Application to Iron-Based Superconductors
- Spin-orbital interplay and topology in the nematic phase of iron pnictides
- Orbital mismatch boosting nematic instability in iron-based superconductors
- Collective modes in pumped unconventional superconductors with competing ground states
- Superconductivity and electronic fluctuations in BaKFeAs studied by Raman scattering
- Subdominant -wave interaction in superconducting CaKFeAs?
- Raman Study of Cooper Pairing Instabilities in (LiFe)OHFeSe
- Short-time dynamics in -wave superconductor with incipient bands
- Anisotropy of the DC conductivity due to orbital-selective spin fluctuations in the nematic phase of iron superconductors