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Sala, G.*; Stone, M. B.*; Halsz, G. B.*; Lumsden, M. D.*; Fay, A, F,*; Pajerowski, D. M.*; Kawamura, Seiko; Kaneko, Koji; Mazzone, D. G.*; Simutis, G.*; et al.
Communications Physics (Internet), 6, p.234_1 - 234_7, 2023/08
Times Cited Count:0 Percentile:0(Physics, Multidisciplinary)Do, S.-H.*; Paddison, J. A. M.*; Sala, G.*; Williams, T. J.*; Kaneko, Koji; Kuwahara, Keitaro*; May, A. F.*; Yan, J.*; McGuire, M. A.*; Stone, M. B.*; et al.
Physical Review B, 106(6), p.L060408_1 - L060408_6, 2022/08
Times Cited Count:10 Percentile:84.45(Materials Science, Multidisciplinary)Shamoto, Shinichi; Wakimoto, Shuichi; Kodama, Katsuaki; Ishikado, Motoyuki; Christianson, A. D.*; Lumsden, M. D.*; Kajimoto, Ryoichi; Nakamura, Mitsutaka; Inamura, Yasuhiro; Arai, Masatoshi; et al.
Physica C, 471(21-22), p.639 - 642, 2011/11
Times Cited Count:0 Percentile:0(Physics, Applied)We have studied low-energy spin excitations on polycrystalline LaFeAsOF samples by inelastic neutron scattering. The dynamical spin susceptibility ''() of the superconducting samples is found to be comparable to that of the magnetically ordered parent sample. On the other hand, ''() almost vanishes at x=0.158, where the superconducting transition temperature T is suppressed to 7 K. This suggests that the low energy spin excitations are closely connected with high-T superconductivity. The disappearance of the spin excitations at low energy would correspond to the disappearance of the hole Fermi surface as the electron concentration increases with doping, as observed in ARPES measurements of BaFeCoAs at x=0.15. The relationship between the spin excitation and the Fermi surface will be discussed in comparison with other iron-based superconductors.
Shamoto, Shinichi; Ishikado, Motoyuki; Christianson, A. D.*; Lumsden, M. D.*; Wakimoto, Shuichi; Kodama, Katsuaki; Iyo, Akira*; Arai, Masatoshi
Physical Review B, 82(17), p.172508_1 - 172508_4, 2010/11
Times Cited Count:42 Percentile:81.29(Materials Science, Multidisciplinary)An optimally doped iron-based superconductor LaFeAsOF with T=29 K has been studied by inelastic powder neutron scattering. The magnetic excitation at Q = 1.15 is enhanced below T, leading to a peak at E=13 meV as the resonance mode.
Shamoto, Shinichi; Wakimoto, Shuichi; Ishikado, Motoyuki; Kodama, Katsuaki; Esaka, Fumitaka; Kajimoto, Ryoichi; Nakamura, Mitsutaka; Inamura, Yasuhiro; Arai, Masatoshi; Christianson, A. D.*; et al.
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no abstracts in English