Effect of Fermi Surface Nesting on Resonant Spin Excitations in Ba1-xKxFe2As2

Abstract

We report inelastic neutron scattering measurements of the resonant spin excitations in Ba1-xKxFe2As2 over a broad range of electron band filling. The fall in the superconducting transi- tion temperature with hole doping coincides with the magnetic excitations splitting into two incom- mensurate peaks because of the growing mismatch in the hole and electron Fermi surface volumes, as confirmed by a tight-binding model with s+- symmetry pairing. The reduction in Fermi surface nesting is accompanied by a collapse of the resonance binding energy and its spectral weight caused by the weakening of electron-electron correlations.

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References in corpus (14)

• Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems
• High-temperature superconductivity in iron-based materials
• LaFeAsO${}_{1-x}$F${}_x$: A low carrier density superconductor near itinerant magnetism
• Theory of magnetic excitations in iron-based layered superconductors
• Strength of the Spin-Fluctuation-Mediated Pairing Interaction in a High-Temperature Superconductor
• Two-dimensional resonant magnetic excitation in BaFe1.84Co0.16As2
• Three-dimensional Resonance in superconducting BaFe${}_{1.9}$Ni${}_{0.1}$As${}_2$
• Neutron Studies of the Iron-based Family of High TC Magnetic Superconductors
• Symmetry of spin excitation spectra in the tetragonal paramagnetic and superconducting phases of 122-ferropnictides
• Neutron Scattering Resonance and the Fe-pnictide Superconducting Gap
• Theory of itinerant magnetic excitations in the SDW phase of iron-based superconductors
• Universality of superconducting gaps in overdoped Ba0.3K0.7Fe2As2 observed by angle-resolved photoemission spectroscopy
• Magnetoelastic Coupling in the Phase Diagram of Ba1-xKxFe2As2
• Incommensurate spin fluctuations in hole-overdoped superconductor KFe2As2

Cited by in corpus (48)

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• Magnetically-Driven Suppression of Nematic Order in an Iron-Based Superconductor
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• Spin fluctuations in iron pnictides and chalcogenides: From antiferromagnetism to superconductivity
• Using controlled disorder to distinguish $s_{\pm }$ and $s_{++}$ gap structure in Fe-based superconductors
• Pauli-Limited Multiband Superconductivity in KFe2As2
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• Superconducting Properties of the $s^{\pm }$-wave state: Fe-based superconductors
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• Double magnetic resonance and spin anisotropy in Fe-based superconductors due to static and fluctuating antiferromagnetic orders
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• Suppression of spin-exciton state in hole overdoped iron-based superconductors
• Neutron Spin Resonance in the Heavily Hole-doped KFe${}_2$As${}_2$ Superconductor
• Temperature dependence of the resonance and low energy spin excitations in superconducting FeTe${}_{0.6}$Se${}_{0.4}$
• High resolution x-ray scattering studies of structural phase transitions in Cr-doped BaFe2As2
• Superconducting gap symmetry in BaFe${}_{1.9}$Ni${}_{0.1}$As${}_2$ superconductor
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• Testing the sign-changing superconducting gap in iron-based superconductors with quasiparticle interference and neutron scattering
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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
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