Spin waves in the block checkerboard antiferromagnetic phase

Feng Lu; Xi Dai

doi:10.1088/1674-1056/21/2/027502

paper

Spin waves in the block checkerboard antiferromagnetic phase

arXiv:1103.5521 · doi:10.1088/1674-1056/21/2/027502

Abstract

Motivated by the discovery of new family 122 iron-based superconductors, we present the theoretical results on the ground state phase diagram, spin wave and dynamic structure factor of the extended $J_{1} - J_{2}$ Heisenberg model. In the reasonable physical parameter region of $K_{2} F e_{4} S e_{5}$ , we fi{}nd the block checkerboard antiferromagnetic order phase is stable. There are two acoustic branches and six optical branches spin wave in the block checkerboard antiferromagnetic phase, which has analytic expression in the high symmetry points. To compare the further neutron scattering experiments, we discuss the saddlepoint structure in the magnetic excitation spectrum and calculate the predicted inelastic neutron scattering pattern based on linear spin wave theory.

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Cited by in corpus (4)

Spin Waves and magnetic exchange interactions in insulating Rb $_{0.89}$ Fe $_{1.58}$ Se $_{2}$
Magnetic Frustration and Iron-Vacancy Ordering in Iron-Chalcogenide
Block antiferromagnetism and possible ferroelectricity in KFe $_{2}$ Se $_{2}$
Magnetic anisotropic energy gap and low energy spin wave excitation in antiferromagnetic block phase of K2Fe4Se5