Orbital-selective superconductivity in the nematic phase of FeSe

Abstract

The interplay between electronic orders and superconductivity is central to the physics of unconventional superconductors, and is particularly pronounced in the iron-based superconductors. Motivated by recent experiments on FeSe, we study the superconducting pairing in its nematic phase in a multiorbital model with frustrated spin-exchange interactions. The electron correlations in the presence of the nematic order give rise to an enhanced orbital selectivity in the superconducting pairing amplitudes. This orbital-selective pairing produces a large gap anisotropy on the Fermi surface. Our results naturally explain the striking experimental observations, and shed new light on the unconventional superconductivity of correlated electron systems in general.

arXiv commentFinal version as published in PRB, Rapid Communications. 6 pages with 4 figures, plus supplementary material

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Cited by in corpus (27)

• On the Remarkable Superconductivity of FeSe and its Close Cousins
• Electron correlations and superconductivity in La${}_3$Ni${}_2$O${}_7$ under pressure tuning
• The Nematic Energy Scale and the Missing Electron Pocket in FeSe
• Nematic Pairing from Orbital Selective Spin Fluctuations in FeSe
• Orbital selectivity in electron correlations and superconducting pairing of iron-based superconductors
• Thermodynamics of transition to BCS-BEC crossover superconductivity in FeSe${}_{1-x}$S${}_x$
• Itinerant approach to magnetic neutron scattering of FeSe: effect of orbital selectivity
• Multiorbital singlet pairing and $d+d$ superconductivity
• Iron-based superconductors: teenage, complex, challenging
• Non-local $d_{xy}$ nematicity and the missing electron pocket in FeSe
• Pairing symmetry and topological surface state in iron-chalcogenide superconductors
• $k_z$ selective scattering within Quasiparticle Interference measurements of FeSe
• Synergy between Hund-driven correlations and boson-mediated Superconductivity
• Orbital-dependent self-energy effects and consequences for the superconducting gap structure in multi-orbital correlated electron systems
• Raman response in the nematic phase of FeSe
• Inter-orbital nematicity and the origin of a single electron Fermi pocket in FeSe
• Evidence for an Additional Symmetry Breaking from Direct Observation of Band Splitting in the Nematic State of FeSe Superconductor
• Interplay of Hidden Orbital Order and Superconductivity in CeCoIn5
• Spin-orbit-coupled superconductivity with spin-singlet non-unitary pairing
• Orbital-selective correlations and renormalized electronic structure in LiFeAs
• Theory of spin-excitation anisotropy in the nematic phase of FeSe obtained from RIXS measurements
• Uniaxial stress effect on the electronic structure of quantum materials
• Intertwined superconductivity and orbital selectivity in a three-orbital Hubbard model for the iron pnictides
• Theory of $(s+id)$ pairing in mixed-valent correlated metals
• Resistivity anisotropy from the multiorbital Boltzmann equation in nematic FeSe
• Ab initio study of orbital-selective superconductivity in $\gamma$-BiPd
• Feedback of non-local $d_{xy}$ nematicity on the magnetic anisotropy in FeSe