Research Article

Frontiers of Physics in China

, Volume 5, Issue 2, pp 166-170

First online:

Magnetic excitations of undoped iron oxypnictides

  • Dao-xin Yao姚道新Affiliated withDepartment of Physics, Purdue University
  • , E. W. CarlsonAffiliated withDepartment of Physics, Purdue University

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access

Abstract

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 that can be made to inelastic neutron scattering experiments, we also give qualitative criteria that can distinguish various regimens of coupling strength. The magnetization reduction due to quantum zero point fluctuations shows clear dependence on the c-axis coupling.

Keywords

iron-based superconductor 3-D Heisenberg model spin-wave neutron scattering sublattice mangetization

PACS numbers

74.25.Ha 74.70.-b 75.30.Ds 76.50.+g