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Journal Articles

Magnetism induced by interlayer electrons in the quasi-two-dimensional electride Y$$_{2}$$C; Inelastic neutron scattering study

Tamatsukuri, Hiromu; Murakami, Yoichi*; Kuramoto, Yoshio*; Sagayama, Hajime*; Matsuura, Masato*; Kawakita, Yukinobu; Matsuishi, Satoru*; Washio, Yasuhito*; Inoshita, Takeshi*; Hamada, Noriaki*; et al.

Physical Review B, 102(22), p.224406_1 - 224406_5, 2020/12

 Times Cited Count:3 Percentile:58.93(Materials Science, Multidisciplinary)

Journal Articles

Quantum dynamics of hydrogen in the iron-based superconductor LaFeAsO$$_{0.9}$$D$$_{0.1}$$ measured with inelastic neutron spectroscopy

Yamaura, Junichi*; Hiraka, Haruhiro*; Iimura, Soshi*; Muraba, Yoshinori*; Bang, J.*; Ikeuchi, Kazuhiko*; Nakamura, Mitsutaka; Inamura, Yasuhiro; Honda, Takashi*; Hiraishi, Masatoshi*; et al.

Physical Review B, 99(22), p.220505_1 - 220505_6, 2019/06

AA2019-0126.pdf:0.9MB

 Times Cited Count:1 Percentile:10.83(Materials Science, Multidisciplinary)

Inelastic neutron scattering was performed for an iron-based superconductor, where most of D (deuterium) replaces oxygen, while a tiny amount goes into interstitial sites. By first-principle calculation, we characterize the interstitial sites for D (and for H slightly mixed) with four equivalent potential minima. Below the superconducting transition temperature Tc = 26 K, new excitations emerge in the range 5-15 meV, while they are absent in the reference system LaFeAsO$$_{0.9}$$F$$_{0.1}$$. The strong excitations at 14.5 meV and 11.1 meV broaden rapidly around 15 K and 20 K, respectively, where each energy becomes comparable to twice of the superconducting gap. The strong excitations are ascribed to a quantum rattling, or a band motion of hydrogen, which arises only if the number of potential minima is larger than two.

Journal Articles

Bipartite magnetic parent phases in the iron oxypnictide superconductor

Hiraishi, Masatoshi*; Iimura, Soshi*; Kojima, Kenji*; Yamaura, Junichi*; Hiraka, Haruhiro*; Ikeda, Kazutaka*; Miao, P.*; Ishikawa, Yoshihisa*; Torii, Shuki*; Miyazaki, Masanori*; et al.

Nature Physics, 10(4), p.300 - 303, 2014/04

 Times Cited Count:94 Percentile:96.38(Physics, Multidisciplinary)

Journal Articles

Magnetic structure and electromagnetic properties of LnCrAsO with a ZrCuSiAs-type structure (Ln = La, Ce, Pr, and Nd)

Park, S.-W.*; Mizoguchi, Hiroshi*; Kodama, Katsuaki; Shamoto, Shinichi; Otomo, Toshiya*; Matsuishi, Satoru*; Kamiya, Toshio*; Hosono, Hideo*

Inorganic Chemistry, 52(23), p.13363 - 13368, 2013/12

 Times Cited Count:20 Percentile:73.1(Chemistry, Inorganic & Nuclear)

Journal Articles

Switching of intra-orbital spin excitations in electron-doped iron pnictide superconductors

Iimura, Soshi*; Matsuishi, Satoru*; Miyakawa, Masashi*; Taniguchi, Takashi*; Suzuki, Katsuhiro*; Usui, Hidetomo*; Kuroki, Kazuhiko*; Kajimoto, Ryoichi; Nakamura, Mitsutaka; Inamura, Yasuhiro; et al.

Physical Review B, 88(6), p.060501_1 - 060501_5, 2013/08

 Times Cited Count:26 Percentile:76.11(Materials Science, Multidisciplinary)

Journal Articles

From antiferromagnetic insulator to ferromagnetic metal; Effect of hydrogen substitution in LaMnAsO

Hanna, Taku*; Matsuishi, Satoru*; Kodama, Katsuaki; Otomo, Toshiya*; Shamoto, Shinichi; Hosono, Hideo*

Physical Review B, 87(2), p.020401_1 - 020401_5, 2013/01

 Times Cited Count:29 Percentile:78.97(Materials Science, Multidisciplinary)

Journal Articles

Structural analysis and superconductivity of CeFeAsO$$_{1-x}$$H$$_{x}$$

Matsuishi, Satoru*; Hanna, Taku*; Muraba, Yoshinori*; Kim, S. W.*; Kim, J. E.*; Takata, Masaki*; Shamoto, Shinichi; Smith, R. I.*; Hosono, Hideo*

Physical Review B, 85(1), p.014514_1 - 014514_6, 2012/01

 Times Cited Count:41 Percentile:85.51(Materials Science, Multidisciplinary)

We performed the neutron powder diffraction and synchrotron X-ray diffraction measurements on CeFeAsO$$_{1-x}$$(D,H)$$_{x}$$ ($$x$$ = 0.0-0.48) as a representative of 1111-type family of iron-based superconductors LnFeAsO$$_{1-x}$$H$$_{x}$$ ($$Ln$$ = lanthanoid). These results strongly suggest that H$$^{-}$$ ions exclusively occupy the oxygen sites in both samples, regardless of the hydrogen species in the starting material.

Journal Articles

Hydrogen in layered iron arsenides; Indirect electron doping to induce superconductivity

Hanna, Taku*; Muraba, Yoshinori*; Matsuishi, Satoru*; Igawa, Naoki; Kodama, Katsuaki; Shamoto, Shinichi; Hosono, Hideo*

Physical Review B, 84(2), p.024521_1 - 024521_7, 2011/07

 Times Cited Count:91 Percentile:94.9(Materials Science, Multidisciplinary)

Oral presentation

Anionic electron-induced magnetism in a two dimensional electride Y$$_{2}$$C

Tamatsukuri, Hiromu; Murakami, Yoichi*; Kuramoto, Yoshio*; Sagayama, Hajime*; Matsuura, Masato*; Kawakita, Yukinobu; Matsuishi, Satoru*; Washio, Yasuhito*; Inoshita, Takeshi*; Hamada, Noriaki*; et al.

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no abstracts in English

9 (Records 1-9 displayed on this page)
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