Inelastic neutron scattering on iron-based superconductor BaFe 2(As,P)2

M. Ishikado; K. Kodama; R. Kajimoto; M. Nakamura; Y. Inamura; S. Wakimoto; A. Iyo; H. Eisaki; M. Arai; S. Shamoto

doi:10.1016/j.physc.2011.05.016

Inelastic neutron scattering on iron-based superconductor BaFe ₂(As,P)₂

M. Ishikado
, K. Kodama
, R. Kajimoto
, M. Nakamura
, Y. Inamura
, S. Wakimoto
, A. Iyo
, H. Eisaki
, M. Arai
, S. Shamoto

Department of Physics

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

Inelastic neutron scattering has been performed on powder sample of an iron-based superconductor BaFe₂(As_0.65P _0.35)₂ with superconducting transition temperature (T _c) = 30 K, whose superconducting (SC) order parameter is expected to have line node. In the normal state, constant-E scan of dynamical structure factor, S(Q, E), exhibits a peak structure centered at momentum transfer Q ∼ 1.20 ^-1, corresponding to antiferromagnetic wave vector. Below T_c, the redistribution of the magnetic spectral weight takes place, resulting in the formation of a peak at E ∼ 12 meV and a gap below 6 meV. The enhanced magnetic peak structure is ascribed to the spin resonance mode, evidencing sign change in the SC order parameter similar to other iron-based high-T_c superconductors. It suggests that fully-gapped s _± symmetry dominates in this superconductor, which gives rise to high-T_c (=30 K) despite the nodal symmetry.

Original language	English
Pages (from-to)	643-646
Number of pages	4
Journal	Physica C: Superconductivity and its Applications
Volume	471
Issue number	21-22
DOIs	https://doi.org/10.1016/j.physc.2011.05.016
Publication status	Published - 2011 Nov

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/j.physc.2011.05.016

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title = "Inelastic neutron scattering on iron-based superconductor BaFe 2(As,P)2",

abstract = "Inelastic neutron scattering has been performed on powder sample of an iron-based superconductor BaFe2(As0.65P 0.35)2 with superconducting transition temperature (T c) = 30 K, whose superconducting (SC) order parameter is expected to have line node. In the normal state, constant-E scan of dynamical structure factor, S(Q, E), exhibits a peak structure centered at momentum transfer Q ∼ 1.20 -1, corresponding to antiferromagnetic wave vector. Below Tc, the redistribution of the magnetic spectral weight takes place, resulting in the formation of a peak at E ∼ 12 meV and a gap below 6 meV. The enhanced magnetic peak structure is ascribed to the spin resonance mode, evidencing sign change in the SC order parameter similar to other iron-based high-Tc superconductors. It suggests that fully-gapped s ± symmetry dominates in this superconductor, which gives rise to high-Tc (=30 K) despite the nodal symmetry.",

author = "M. Ishikado and K. Kodama and R. Kajimoto and M. Nakamura and Y. Inamura and S. Wakimoto and A. Iyo and H. Eisaki and M. Arai and S. Shamoto",

note = "Funding Information: We would like to thank S. Ishida, K. Kihou and K. Miyazawa for valuable suggestion. This work was supported by JST, TRIP, and Grant-in-Aid for Specially Promoted Research, Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan (No. 17001001).",

year = "2011",

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doi = "10.1016/j.physc.2011.05.016",

language = "English",

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pages = "643--646",

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T1 - Inelastic neutron scattering on iron-based superconductor BaFe 2(As,P)2

AU - Ishikado, M.

AU - Kodama, K.

AU - Kajimoto, R.

AU - Nakamura, M.

AU - Inamura, Y.

AU - Wakimoto, S.

AU - Iyo, A.

AU - Eisaki, H.

AU - Arai, M.

AU - Shamoto, S.

N1 - Funding Information: We would like to thank S. Ishida, K. Kihou and K. Miyazawa for valuable suggestion. This work was supported by JST, TRIP, and Grant-in-Aid for Specially Promoted Research, Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan (No. 17001001).

PY - 2011/11

Y1 - 2011/11

N2 - Inelastic neutron scattering has been performed on powder sample of an iron-based superconductor BaFe2(As0.65P 0.35)2 with superconducting transition temperature (T c) = 30 K, whose superconducting (SC) order parameter is expected to have line node. In the normal state, constant-E scan of dynamical structure factor, S(Q, E), exhibits a peak structure centered at momentum transfer Q ∼ 1.20 -1, corresponding to antiferromagnetic wave vector. Below Tc, the redistribution of the magnetic spectral weight takes place, resulting in the formation of a peak at E ∼ 12 meV and a gap below 6 meV. The enhanced magnetic peak structure is ascribed to the spin resonance mode, evidencing sign change in the SC order parameter similar to other iron-based high-Tc superconductors. It suggests that fully-gapped s ± symmetry dominates in this superconductor, which gives rise to high-Tc (=30 K) despite the nodal symmetry.

AB - Inelastic neutron scattering has been performed on powder sample of an iron-based superconductor BaFe2(As0.65P 0.35)2 with superconducting transition temperature (T c) = 30 K, whose superconducting (SC) order parameter is expected to have line node. In the normal state, constant-E scan of dynamical structure factor, S(Q, E), exhibits a peak structure centered at momentum transfer Q ∼ 1.20 -1, corresponding to antiferromagnetic wave vector. Below Tc, the redistribution of the magnetic spectral weight takes place, resulting in the formation of a peak at E ∼ 12 meV and a gap below 6 meV. The enhanced magnetic peak structure is ascribed to the spin resonance mode, evidencing sign change in the SC order parameter similar to other iron-based high-Tc superconductors. It suggests that fully-gapped s ± symmetry dominates in this superconductor, which gives rise to high-Tc (=30 K) despite the nodal symmetry.

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ER -

Inelastic neutron scattering on iron-based superconductor BaFe ₂(As,P)₂

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