Neutron Scattering Study on Spin Dynamics in Superconducting (Tl,Rb)2Fe4Se5

Songxue Chi; Feng Ye; Wei Bao; Minghu Fang; H. D. Wang; C. H. Dong; A. T. Savici; G. E. Granroth; M. B. Stone; R. S. Fishman

doi:10.1103/PhysRevB.87.100501

Neutron Scattering Study on Spin Dynamics in Superconducting (Tl,Rb)2Fe4Se5

Superconductivity 2013-03-06 v1 Strongly Correlated Electrons

Authors: Songxue Chi , Feng Ye , Wei Bao , Minghu Fang , H. D. Wang , C. H. Dong , A. T. Savici , G. E. Granroth , M. B. Stone , R. S. Fishman

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Abstract

We observed in superconducting (Tl,Rb)2Fe4Se5 spin-wave branches that span an energy range from 6.5 to 209 meV. Spin dynamics are successfully described by a Heisenberg localized spin model whose dominant in-plane interactions include only the nearest (J1 and J1') and next nearest neighbor (J2 and J2') exchange terms within and between the tetramer spin blocks, respectively. These experimentally determined exchange constants would crucially constrain the theoretical viewpoints on magnetism and superconductivity in the Fe-based materials.

Keywords

spin excitations in condensed matter unconventional superconductivity iron-based superconductor

Cite

@article{arxiv.1301.2413,
  title  = {Neutron Scattering Study on Spin Dynamics in Superconducting (Tl,Rb)2Fe4Se5},
  author = {Songxue Chi and Feng Ye and Wei Bao and Minghu Fang and H. D. Wang and C. H. Dong and A. T. Savici and G. E. Granroth and M. B. Stone and R. S. Fishman},
  journal= {arXiv preprint arXiv:1301.2413},
  year   = {2013}
}

Neutron Scattering Study on Spin Dynamics in Superconducting (Tl,Rb)2Fe4Se5

Abstract

Keywords

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