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Spin waves and magnetic exchange interactions in the spin-ladder compound RbFe2Se3

  • Author(s): Wang, M
  • Yi, M
  • Jin, S
  • Jiang, H
  • Song, Y
  • Luo, H
  • Christianson, AD
  • De La Cruz, C
  • Bourret-Courchesne, E
  • Yao, DX
  • Lee, DH
  • Birgeneau, RJ
  • et al.
Abstract

© 2016 American Physical Society. We report an inelastic neutron scattering study of the spin waves of the one-dimensional antiferromagnetic spin ladder compound RbFe2Se3. The results reveal that the products, SJ's, of the spin S and the magnetic exchange interaction J along the antiferromagnetic (leg) direction and the ferromagnetic (rung) direction are comparable with those for the stripe ordered phase of the parent compounds of the iron-based superconductors. The universality of the SJ's implies nearly universal spin wave dynamics and the irrelevance of the fermiology for the existence of the stripe antiferromagnetic order among various Fe-based materials.

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