Incommensurate itinerant antiferromagnetic excitations and spin resonance in the FeTe0.6Se0.4 superconductor

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • D. N. Argyriou
  • A. Hiess
  • A. Akbari
  • I. Eremin
  • M. M. Korshunov
  • Jin Hu
  • Bin Qian
  • Zhiqiang Mao
  • Yiming Qiu
  • Collin Broholm

Detail(s)

Original languageEnglish
Article number220503(R)
Journal / PublicationPhysical Review B - Condensed Matter and Materials Physics
Volume81
Issue number22
Online published14 Jun 2010
Publication statusPublished - Jun 2010
Externally publishedYes

Abstract

We report on inelastic neutron-scattering measurements that find itinerantlike incommensurate magnetic excitations in the normal state of superconducting FeTe0.6Se0.4 (Tc=14 K) at wave vector Qinc=(1/2±ε, 1/2-+ε) with ε=0.09 (1). In the superconducting state only the lower energy part of the spectrum shows significant changes by the formation of a gap and a magnetic resonance that follows the dispersion of the normal-state excitations. We use a four band model to describe the Fermi-surface topology of this iron-based superconductors with the extended s (±) symmetry and find that it qualitatively captures the salient features of these data.

Citation Format(s)

Incommensurate itinerant antiferromagnetic excitations and spin resonance in the FeTe0.6Se0.4 superconductor. / Argyriou, D. N.; Hiess, A.; Akbari, A. et al.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 81, No. 22, 220503(R), 06.2010.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review