Spin resonance mode on Fe-based superconductor BaFe(As,P) with $T_{rm c}$ =30K

Ishikado, Motoyuki; Nagai, Yuki ; Kodama, Katsuaki ; Kajimoto, Ryoichi ; Nakamura, Mitsutaka ; Inamura, Yasuhiro ; Wakimoto, Shuichi ; Nakamura, Hiroki ; Machida, Masahiko ; Suzuki, Katsuhiro*; Usui, Hidetomo*; Kuroki, Kazuhiko*; Iyo, Akira*; Eisaki, Hiroshi*; Arai, Masatoshi; Shamoto, Shinichi

In this study, we performed inelastic neutron scattering measurement on 36g polycrystalline powder sample of optimally-doped BaFe(As $_{0.65}$ ,P $_{0.35}$ ) using Fermi chopper spectrometer 4SEASONS in J-PARC. Unexpectedly, we observed spin resonance at the same -position and nearly identical resonance enhancement ratio to other iron-based superconductors with fully-gapped $s_{pm}$ -wave. We will discuss about the possible superconducting gap symmetry based on our inelastic neutron scattering experiment and theoretical calculations.

Language	:	English
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Meeting title	:	5th European Conference on Neutron Scattering (ECNS 2011)
Held date	:	2011/07
Location (city)	:	Prague
Location (country)	:	Czech Republic
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Cooperating Institute	:	科学技術振興機構

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Registration No. : BB20111030
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Spin resonance mode on Fe-based superconductor BaFe(As,P) with =30K

Spin resonance mode on Fe-based superconductor BaFe(As,P) with $T_{rm c}$ =30K