検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

$$^{195}$$Pt-NMR study on noncentrosymmetric heavy-fermion superconductor CePt$$_3$$Si

結晶構造に反転対称性のない重い電子系超伝導物質CePt$$_3$$Siの$$^{195}$$Pt-NMRによる研究

與儀 護*; 北岡 良雄*; 橋本 信*; 安田 敬*; 摂待 力生*; 松田 達磨; 芳賀 芳範  ; 大貫 惇睦; Rogl, P.*; Bauer, E.*

Yogi, Mamoru*; Kitaoka, Yoshio*; Hashimoto, Shin*; Yasuda, Takashi*; Settai, Rikio*; Matsuda, Tatsuma; Haga, Yoshinori; Onuki, Yoshichika; Rogl, P.*; Bauer, E.*

結晶構造に反転対称性のないCePt$$_3$$Siの磁気的性質と超伝導特性をPt核の核緩和時間1/$$T$$$$_1$$を測定することで調べた。この化合物は反強磁性状態($$T_{rm N}$$=2.2K)と超伝導状態($$T_{rm c}$$=0.75K)が共存する。CePt$$_3$$Siは1/$$T$$$$_1$$$$T_{rm c}$$の直下でピークを示す初めての重い電子系超伝導物質である。超伝導状態の特異な核緩和時間の温度依存性から、反転対称性のない超伝導物質CePt$$_3$$Siでおそらく新奇な超伝導状態が実現していると考えられる。

We report on magnetic and novel superconducting properties in heavy-fermion (HF) noncentrosymmetric compound CePt$$_3$$Si via the measurement of $$^{195}$$Pt nuclear spin-lattice relaxation rate 1/$$T$$$$_1$$. This compound reveals the uniform coexistence of antiferromagnetism ($$T_{rm N}$$ =2.2 K) and superconductivity ($$T_{rm c}$$ =0.75 K). CePt$$_3$$Si is the first HF superconductor that reveals a peak in 1/$$T$$$$_1$$ just below $$T_{rm c}$$ and, additionally, does not follow the $$T^3$$ law that was observed for most unconventional HF superconductors. The novel relaxation behavior found below $$T_{rm c}$$ may be relevant with a possible novel SC state being realized in the noncentrosymmetric CePt$$_3$$Si.

Access

:

- Accesses

InCites™

:

パーセンタイル:42.69

分野:Chemistry, Multidisciplinary

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.