Absence of strong magnetic fluctuations in the iron phosphide superconductors LaFePO and Sr2ScO3FeP
arXiv:1302.5057 · doi:10.1088/0953-8984/25/42/425701
Abstract
We report neutron inelastic scattering measurements on polycrystalline LaFePO and Sr2ScO3FeP, two members of the iron phosphide families of superconductors. No evidence is found for any magnetic fluctuations in the spectrum of either material in the energy and wavevector ranges probed. Special attention is paid to the wavevector at which spin-density-wave-like fluctuations are seen in other iron-based superconductors. We estimate that the magnetic signal, if present, is at least a factor of four (Sr2ScO3FeP) or seven (LaFePO) smaller than in the related iron arsenide and chalcogenide superconductors. These results suggest that magnetic fluctuations are not as influential on the electronic properties of the iron phosphide systems as they are in other iron-based superconductors.
7 pages, 5 figures
References in corpus (20)
- Strong Correlations and Magnetic Frustration in the High Tc Iron Pnictides
- Magnetism and its microscopic origin in iron-based high-temperature superconductors
- Electronic structure of the iron-based superconductor LaOFeP
- Magnetism in Fe-based superconductors
- Superconductivity at 17 K in (Fe2P2)(Sr4Sc2O6): a new superconducting layered pnictide oxide with a thick perovskite oxide layer
- Evidence for nodal superconductivity in LaFePO
- Fermi surface of superconducting LaFePO determined by quantum oscillations
- High energy spin excitations in BaFe2As2
- Neutron Scattering Resonance and the Fe-pnictide Superconducting Gap
- Intrinsic Properties of Stoichiometric LaOFeP
- Spin fluctuations in LiFeAs observed by neutron scattering
- Electromagnetic properties and electronic structure of iron-based layered superconductor LaOFeP
- Incommensurate magnetic excitations in superconducting LiFeAs
- MuSR studies of RE(O,F)FeAs (RE = La, Nd, Ce) and LaOFeP systems: possible incommensurate/stripe magnetism and superfluid density
- Spin Dynamics in Iron-based Layered Superconductor (La_{0.87}Ca_{0.13})FePO Revealed by ^{31}P and ^{139}La NMR Studies
- Contrasts in electron correlations and inelastic scattering between LiFeAs and LiFeP revealed by charge transport
- Antiferromagnetic spin excitations in single crystals of nonsuperconducting Li1-xFeAs
- Temperature - pressure phase diagram of the superconducting iron pnictide LiFeP
- Low-Energy Quasiparticles Probed by Heat Transport in the Iron Based Superconductor LaFePO
- Enhanced low-energy spin dynamics with diffusive character in the iron-based superconductor (La0.87Ca0.13)FePO: Analogy with high Tc cuprates (A short note)