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

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

Research output: Contribution to journalArticle

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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.

Original languageEnglish (US)
Article number220503
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume81
Issue number22
DOIs
StatePublished - Jun 14 2010

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Inelastic neutron scattering
spin resonance
Fermi surface
Magnetic resonance
Superconducting materials
Topology
excitation
Fermi surfaces
magnetic resonance
inelastic scattering
neutron scattering
topology
iron
symmetry
Iron-based Superconductors
energy

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Argyriou, D. N. ; Hiess, A. ; Akbari, A. ; Eremin, I. ; Korshunov, M. M. ; Hu, Jin ; Qian, Bin ; Mao, Zhiqiang ; Qiu, Yiming ; Broholm, Collin ; Bao, W. / Incommensurate itinerant antiferromagnetic excitations and spin resonance in the FeTe0.6Se0.4 superconductor. In: Physical Review B - Condensed Matter and Materials Physics. 2010 ; Vol. 81, No. 22.
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Incommensurate itinerant antiferromagnetic excitations and spin resonance in the FeTe0.6Se0.4 superconductor. / Argyriou, D. N.; Hiess, A.; Akbari, A.; Eremin, I.; Korshunov, M. M.; Hu, Jin; Qian, Bin; Mao, Zhiqiang; Qiu, Yiming; Broholm, Collin; Bao, W.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 81, No. 22, 220503, 14.06.2010.

Research output: Contribution to journalArticle

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T1 - Incommensurate itinerant antiferromagnetic excitations and spin resonance in the FeTe0.6Se0.4 superconductor

AU - Argyriou, D. N.

AU - Hiess, A.

AU - Akbari, A.

AU - Eremin, I.

AU - Korshunov, M. M.

AU - Hu, Jin

AU - Qian, Bin

AU - Mao, Zhiqiang

AU - Qiu, Yiming

AU - Broholm, Collin

AU - Bao, W.

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AB - 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.

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