Spin fluctuations away from (pi,0) in the superconducting phase of molecular-intercalated FeSe

Magnetic fluctuations in the molecular-intercalated FeSe superconductor Li{x}(ND2){y}(ND3){1-y}Fe2Se2 (Tc = 43K) have been measured by inelastic neutron scattering from a powder sample. The strongest magnetic scattering is observed at a wave vector Q ~ 1.4 A^{-1}, which is not consistent with the (p...

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Bibliographic Details
Published inarXiv.org
Main Authors Taylor, A E, Sedlmaier, S J, Cassidy, S J, Goremychkin, E A, Ewings, R A, Perring, T G, Clarke, S J, Boothroyd, A T
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 21.05.2013
Subjects
Inelastic scattering
Iron
Magnetic resonance
Magnetic variations
Nesting
Neutron scattering
Neutrons
Physics - Strongly Correlated Electrons
Physics - Superconductivity
Superconductivity
Superconductors
Wave dispersion
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Summary:Magnetic fluctuations in the molecular-intercalated FeSe superconductor Li{x}(ND2){y}(ND3){1-y}Fe2Se2 (Tc = 43K) have been measured by inelastic neutron scattering from a powder sample. The strongest magnetic scattering is observed at a wave vector Q ~ 1.4 A^{-1}, which is not consistent with the (pi,0) nesting wave vector that characterizes magnetic fluctuations in several other iron-based superconductors, but is close to the (pi, pi/2) position found for A{x}Fe{2-y}Se2 systems. At the energies probed (~ 5kB Tc), the magnetic scattering increases in intensity with decreasing temperature below Tc, consistent with the superconductivity-induced magnetic resonance found in other iron-based superconductors.
ISSN:2331-8422
DOI:10.48550/arxiv.1305.4898