Zn doping in FeSe produces nonmonotonic Tc evolution and preserves robust multigap superconductivity consisting of an isotropic s-wave gap plus an anisotropic extended s-wave gap.
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Combined inelastic neutron scattering and DFT calculations demonstrate energy-dependent 3D spin susceptibility in an iron-based superconductor, with a peak at the out-of-plane AFM wavevector driven by non-Fermi-surface states.
Using a five-orbital model, the study finds the spin resonance peak energy in Fe-based superconductors depends on gap equality across bands and shifts to lower frequencies with larger Hubbard U and Hund's J.
citing papers explorer
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Nonmonotonic Evolution of the Superconducting Transition Temperature and Robust Multigap Extended s-wave + s-wave Pairing in Zn-Substituted FeSe Single Crystals
Zn doping in FeSe produces nonmonotonic Tc evolution and preserves robust multigap superconductivity consisting of an isotropic s-wave gap plus an anisotropic extended s-wave gap.
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Three-dimensional spin susceptibility in Ba$_{0.75}$K$_{0.25}$Fe$_{2}$As$_{2}$: Out-of-plane modulation revealed by neutron spectroscopy and theoretical modeling
Combined inelastic neutron scattering and DFT calculations demonstrate energy-dependent 3D spin susceptibility in an iron-based superconductor, with a peak at the out-of-plane AFM wavevector driven by non-Fermi-surface states.
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Role of interactions in the energy of the spin resonance peak in Fe-based superconductors
Using a five-orbital model, the study finds the spin resonance peak energy in Fe-based superconductors depends on gap equality across bands and shifts to lower frequencies with larger Hubbard U and Hund's J.