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Journal Articles

Field-tuned quantum renormalization of spin dynamics in the honeycomb lattice Heisenberg antiferromagnet YbCl$$_3$$

Sala, G.*; Stone, M. B.*; Hal$'a$sz, 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

https://doi.org/10.1038/s42005-023-01333-7
 Times Cited Count：0 Percentile：0(Physics, Multidisciplinary)

Journal Articles

Gaps in topological magnon spectra; Intrinsic versus extrinsic effects

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

https://doi.org/10.1103/PhysRevB.106.L060408
 Times Cited Count：10 Percentile：83.82(Materials Science, Multidisciplinary)

Journal Articles

Neutron scattering of iron-based superconductors

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

https://doi.org/10.1016/j.physc.2011.05.015
 Times Cited Count：0 Percentile：0(Physics, Applied)

We have studied low-energy spin excitations on polycrystalline LaFeAsO$$_{1-x}$$F$$_{x}$$ samples by inelastic neutron scattering. The dynamical spin susceptibility $$chi$$''($$omega$$) of the superconducting samples is found to be comparable to that of the magnetically ordered parent sample. On the other hand, $$chi$$''($$omega$$) almost vanishes at x=0.158, where the superconducting transition temperature T$$_{c}$$ is suppressed to 7 K. This suggests that the low energy spin excitations are closely connected with high-T$$_{c}$$ 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 BaFe$$_{2-x}$$Co$$_{x}$$As$$_{2}$$ at x=0.15. The relationship between the spin excitation and the Fermi surface will be discussed in comparison with other iron-based superconductors.

Journal Articles

Inelastic neutron scattering study of the resonance mode in the optimally doped pnictide superconductor LaFeAsO$$_{0.92}$$F$$_{0.08}$$

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

https://doi.org/10.1103/PhysRevB.82.172508
 Times Cited Count：42 Percentile：81.37(Materials Science, Multidisciplinary)

An optimally doped iron-based superconductor LaFeAsO$$_{0.92}$$F$$_{0.08}$$ with T$$_{c}$$=29 K has been studied by inelastic powder neutron scattering. The magnetic excitation at Q = 1.15 $$AA $$$$^{-1}$$ is enhanced below T$$_{c}$$, leading to a peak at E$$_{res}$$=13 meV as the resonance mode.

Oral presentation

Magnetic excitation spectra of iron based superconductor LaFeAsO$$_{1-x}$$F$$_{x}$$ system

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

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