Magnetic Excitations of Undoped Iron Oxypnictides

Details Magnetic Excitations of Undoped Iron Oxypnictides Magnetic Excitations of Undoped Iron Oxypnictides

2009-10-14

arxiv.org/abs/0910.2528v1

Frontiers of Physics in China 5, 166 (2010)

Physics

Condensed Matter

Superconductivity

4 pages, 5 figures, to appear in Frontiers of Physics in China: a special issue on Iron-based superconductors

Scientific paper

10.1007/s11467-009-0075-x

We study the magnetic excitations of undoped iron oxypnictides using a three-dimensional Heisenberg model with single-ion anisotropy. Analytic forms of the spin wave dispersion, velocities, and structure factor are given. Aside from quantitative comparisons which can be made to inelastic neutron scattering experiments, we also give qualitative criteria which can distinguish various regimes of coupling strength. The magnetization reduction due to quantum zero point fluctuations shows clear dependence on the c-axis coupling.

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