TY - JOUR
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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U2 - 10.1016/j.physc.2011.05.016
DO - 10.1016/j.physc.2011.05.016
M3 - Article
AN - SCOPUS:80054969253
SN - 0921-4534
VL - 471
SP - 643
EP - 646
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
IS - 21-22
ER -