Resonant spin excitation on iron-based superconductor BaFe(As,P)

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 have performed inelastic neutron scattering measurement on 36g powder sample of optimally-doped BaFe(As,P) whose superconducting order parameter is expected to have line node by Fermi chopper spectrometer 4SEASONS in J-PARC. Unexpectedly, we have observed spin resonance at same -position and nearly identical resonance enhancement ration to other iron-based superconducctors with fully-gapped $s_{+-}$ -wave. We will discuss about the possible superconducting gap symmetry based on our experimental results.

Language	:	English
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Meeting title	:	11th Japan-Korea Meeting on Neutron Science
Held date	:	2011/01
Location (city)	:	Seoul
Location (country)	:	Korea
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Cooperating Institute	:	JST-TRiP

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Registration No. : BB20103761
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