JOPSS - Search Results

Journal Articles

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

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

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

Damped Dirac magnon in the metallic kagome antiferromagnet FeSn

Do, S.-H.*; Kaneko, Koji; Kajimoto, Ryoichi; Kamazawa, Kazuya*; Stone, M. B.*; Lin, J. Y. Y.*; Ito, Shinichi*; Masuda, Takatsugu*; Samolyuk, G. D.*; Dagotto, E.*; et al.

Physical Review B, 105(18), p.L180403_1 - L180403_6, 2022/05

https://doi.org/10.1103/PhysRevB.105.L180403

Times Cited Count：12 Percentile：87.73(Materials Science, Multidisciplinary)

Journal Articles

Coexisting spin resonance and long-range magnetic order of Eu in EuRbFe $_{4}$ As $_{4}$

Iida, Kazuki*; Nagai, Yuki; Ishida, Shigeyuki*; Ishikado, Motoyuki*; Murai, Naoki; Christianson, A. D.*; Yoshida, Hiroyuki*; Inamura, Yasuhiro; Nakamura, Hiroki; Nakao, Akiko*; et al.

Physical Review B, 100(1), p.014506_1 - 014506_8, 2019/07

https://doi.org/10.1103/PhysRevB.100.014506

Times Cited Count：34 Percentile：85.28(Materials Science, Multidisciplinary)

Magnetic excitations and magnetic structure of EuRbFe $_{4}$ As $_{4}$ were investigated by neutron scattering measurements.

Journal Articles

Spin resonance in the new-structure-type iron-based superconductor CaKFe $_{4}$ As $_{4}$

Iida, Kazuki*; Ishikado, Motoyuki*; Nagai, Yuki; Yoshida, Hiroyuki*; Christianson, A. D.*; Murai, Naoki; Kawashima, Kenji*; Yoshida, Yoshiyuki*; Eisaki, Hiroshi*; Iyo, Akira*

Journal of the Physical Society of Japan, 86(9), p.093703_1 - 093703_4, 2017/09

https://doi.org/10.7566/JPSJ.86.093703

Times Cited Count：23 Percentile：79.15(Physics, Multidisciplinary)

Journal Articles

Phonons of Fe-based superconductor Ca $_{10}$ PtAs(Fe $_{1-x}$ PtAs) $_{10}$

Ikeuchi, Kazuhiko*; Kobayashi, Yoshiaki*; Suzukia, Kazunori*; Ito, Masayuki*; Kajimoto, Ryoichi; Bourges, P.*; Christianson, A. D.*; Nakamura, Hiroki; Machida, Masahiko; Sato, Masatoshi*

Journal of Physics; Condensed Matter, 27(46), p.465701_1 - 465701_7, 2015/11

https://doi.org/10.1088/0953-8984/27/46/465701

Times Cited Count：1 Percentile：4.82(Physics, Condensed Matter)

We report the results of inelastic neutron scattering measurements on particular phonons of a superconducting (SC) Ca $_{10}$ PtAs(Fe $_{1-x}$ PtAs) $_{10}$ with the onset transition temperature K to investigate mainly what roles orbital fluctuation plays in Cooper pairing, where we observed a slight softening of the in-plane transverse acoustic mode corresponding to the elastic constant $C_{66}$ . This softening starts at temperature well above the SC , as decreases. An anomalously strong change of the scattering intensity of in-plane optical modes was observed at the M point of the pseudo tetragonal reciprocal space in the range of 35 40 meV with decreasing from far above . Because this region mainly corresponds to the motion of Fe and As atoms in the FeAs planes, the finding presents information on the coupling between the orbital fluctuation of Fe electrons and the lattice system, useful for studying the possible roles of orbital fluctuation in the pairing mechanism and/or the appearance of the so-called nematic phase.

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 ''() 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 $_{c}$ 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 $^{-1}$ 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.

no journal, ,

no abstracts in English

Oral presentation

multiplet excitation in metallic trivalent Eu compound EuPd

Kaneko, Koji; Pokharel, G.*; Christianson, A. D.*; Takeuchi, Tetsuya*; Nakamura, Ai*; Hedo, Masato*; Nakama, Takao*; Onuki, Yoshichika*

no journal, ,

no abstracts in English

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

Gaps in topological magnon spectra; Intrinsic versus extrinsic effects

Damped Dirac magnon in the metallic kagome antiferromagnet FeSn

Coexisting spin resonance and long-range magnetic order of Eu in EuRbFe $_{4}$ As $_{4}$

Spin resonance in the new-structure-type iron-based superconductor CaKFe $_{4}$ As $_{4}$

Phonons of Fe-based superconductor Ca $_{10}$ PtAs(Fe $_{1-x}$ PtAs) $_{10}$

Neutron scattering of iron-based superconductors

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

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

multiplet excitation in metallic trivalent Eu compound EuPd