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Koyama, Takehide*; Ozaki, Yuzuru*; Ueda, Koichi*; Mito, Takeshi*; Kohara, Takao*; Waki, Takeshi*; Tabata, Yoshikazu*; Michioka, Chishiro*; Yoshimura, Kazuyoshi*; Suzuki, Michito; et al.
Journal of the Physical Society of Japan, 81(Suppl.B), p.SB008_1 - SB008_5, 2012/12
Times Cited Count:1 Percentile:10.76(Physics, Multidisciplinary)The normal state properties of a noncentrosymmetric superconductor MoAlC are studied by means of the nuclear magnetic resonance (NMR) experiment. The change of NMR line shape and the peak of the nuclear spin-echo decay rate at 130 K indicate that the MoAlC exhibits the phase transition prior to the emergence of superconductivity. The reduction in the conduction electron density is inferred from the decrease in the nuclear spin-lattice relaxation rate. The nature of the newly found phase transition is discussed by considering the result of the first principle calculations, indicating a good nesting property of the Fermi surfaces.
Koyama, Takehide*; Ozaki, Yuzuru*; Ueda, Koichi*; Mito, Takeshi*; Kohara, Takao*; Waki, Tsuyoshi*; Tabata, Yoshikazu*; Michioka, Chishiro*; Yoshimura, Kazuyoshi*; Suzuki, Michito; et al.
Physical Review B, 84(21), p.212501_1 - 212501_4, 2011/12
Times Cited Count:12 Percentile:46.97(Materials Science, Multidisciplinary)The results of Al nuclear magnetic resonance and specific-heat measurements of the noncentrosymmetric superconductor MoAlC are reported. The phase transition around 130 K is inferred from a distinct change in the NMR spectrum, a clear peak in the spin-echo decay rate, and an anomaly in the specific heat. Possibility of charge-density wave ordering around 130 K is discussed by calculating the Fermi surfaces in the normal states and considering the partial quenching of the Fermi surfaces with the decrease in 1/ below the superconducting transition temperature.
Taniguchi, Takumi; Namiki, Masahiro*; Tabata, Koichi; Kakuda, Ayaka; Sone, Tomoyuki; Osugi, Takeshi; Kuroki, Ryoichiro
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no abstracts in English
Kakuda, Ayaka; Namiki, Masahiro*; Tabata, Koichi; Osawa, Norihisa*; Kaneda, Yoshihisa*; Kikuchi, Michio*; Yamamoto, Takeshi*; Sone, Tomoyuki; Osugi, Takeshi; Kuroki, Ryoichiro
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no abstracts in English
Tabata, Koichi; Namiki, Masahiro*; Osawa, Norihisa*; Sakamoto, Ryo*; Kaneda, Yoshihisa*; Kakuda, Ayaka; Sone, Tomoyuki; Osugi, Takeshi; Kuroki, Ryoichiro
no journal, ,
no abstracts in English
Tabata, Koichi; Sato, Junya; Saito, Toshimitsu*; Sunahara, Jun*; Taniguchi, Takumi; Osugi, Takeshi
no journal, ,
no abstracts in English
Hiraki, Yoshihisa; Tabata, Koichi; Taniguchi, Takumi; Kuroki, Ryoichiro; Osugi, Takeshi
no journal, ,
no abstracts in English