Anisotropic three-dimensional magnetism in CaFe2As2

Abstract

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.

17 pages, 3 figures

References in corpus (16)

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• Theory of Electron Nematic Order in LaOFeAs
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• Unified electronic phase diagram for hole-doped high-Tc cuprates
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Cited by in corpus (16)

• Magnetism in Fe-based superconductors
• Two-dimensional resonant magnetic excitation in BaFe1.84Co0.16As2
• Three-dimensional Resonance in superconducting BaFe${}_{1.9}$Ni${}_{0.1}$As${}_2$
• Itinerant magnetic excitations in antiferromagnetic CaFe2As2
• Anisotropic itinerant magnetism and spin fluctuations in BaFe2As2: A neutron scattering study
• Symmetry of spin excitation spectra in the tetragonal paramagnetic and superconducting phases of 122-ferropnictides
• Anisotropy, Itineracy, and Magnetic Frustration in High-Tc Iron Pnictides
• Spin excitations in the excitonic spin-density-wave state of the iron pnictides
• Pnictides as frustrated quantum antiferromagnet close to a quantum phase transition
• Lattice and electronic anomalies of CaFe_2As_2 studied by Raman spectroscopy
• Suppression of antiferromagnetic spin fluctuations in the collapsed tetragonal phase of CaFe2As2
• First order magnetic transition in single crystal CaFe${}_2$As${}_2$ detected by ${}^{75}$As NMR
• Spin and Charge Dynamics Ruled by Antiferromagnetic Order in Iron Pnictides
• Antiferromagnetic spin excitations in single crystals of nonsuperconducting Li1-xFeAs
• Low energy spin dynamics in the antiferromagnetic phase of CaFe2As2
• Ordered moment in the anisotropic and frustrated square lattice Heisenberg model