Physics – Condensed Matter – Superconductivity
Scientific paper
2008-09-08
Physics
Condensed Matter
Superconductivity
17 pages, 3 figures
Scientific paper
10.1103/PhysRevLett.101.227205
Inelastic neutron scattering measurements on the low energy spin waves in CaFe2As2 show that the magnetic exchange interactions in the Fe layers are exceptionally large and similar to the cuprates. However, the exchange between layers is ~10% of the coupling in the layers and the magnetism is more appropriately categorized as anisotropic three-dimensional, in contrast to the two-dimensional cuprates. Band structure calculations of the spin dynamics and magnetic exchange interactions are in good agreement with the experimental data.
Antropov Vladimir P.
Broholm Collin
Canfield Paul. C.
Diallo S. O.
Goldman Alan I.
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