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

doi:10.1103/PhysRevB.81.220503

Incommensurate itinerant antiferromagnetic excitations and spin resonance in the FeTe_0.6Se_0.4 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: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

84 Citations (Scopus)

Abstract

We report on inelastic neutron-scattering measurements that find itinerantlike incommensurate magnetic excitations in the normal state of superconducting FeTe_0.6Se_0.4 (T_c=14 K) at wave vector Q_inc=(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 language	English
Article number	220503(R)
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	81
Issue number	22
Online published	14 Jun 2010
DOIs	https://doi.org/10.1103/PhysRevB.81.220503
Publication status	Published - Jun 2010
Externally published	Yes

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Argyriou, D. N., Hiess, A., Akbari, A., Eremin, I., Korshunov, M. M., Hu, J., Qian, B., Mao, Z., Qiu, Y., Broholm, C., & Bao, W. (2010). Incommensurate itinerant antiferromagnetic excitations and spin resonance in the FeTe_0.6Se_0.4 superconductor. Physical Review B - Condensed Matter and Materials Physics, 81(22), Article 220503(R). https://doi.org/10.1103/PhysRevB.81.220503

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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.",

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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.

PY - 2010/6

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N2 - 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.

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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