このエントリーをはてなブックマークに追加
ID 51905
著者
Zheng, Lu Okayama Univ, Res Lab Surface Sci
Izumi, Masanari Okayama Univ, Res Lab Surface Sci
Sakai, Yusuke Okayama Univ, Res Lab Surface Sci
Eguchi, Ritsuko Okayama Univ, Res Lab Surface Sci
Goto, Hidenori Okayama Univ, Res Lab Surface Sci
Takabayashi, Yasuhiro Okayama Univ, Res Lab Surface Sci
Kambe, Takashi Okayama Univ, Dept Phys
Onji, Taiki Okayama Univ, Dept Phys
Araki, Shingo Okayama Univ, Dept Phys
Kobayashi, Tatsuo C. Okayama Univ, Dept Phys
Kim, Jungeun RIKEN, SPring Ctr 8, Japan Synchrotron Radiat Res Inst
Fujiwara, Akihiko RIKEN, SPring Ctr 8, Japan Synchrotron Radiat Res Inst
Kubozono, Yoshihiro Okayama Univ, Res Lab Surface Sci
抄録
Alkali-metal-intercalated FeSe materials, (NH3)(y)M0.4FeSe (M: K, Rb, and Cs), have been synthesized using the liquid NH3 technique. (NH3)(y)Cs0.4FeSe shows a superconducting transition temperature (T-c) as high as 31.2 K, which is higher by 3.8 K than the T-c of nonammoniated Cs0.4FeSe. The T(c)s of (NH3)(y)K0.4FeSe and (NH3)(y)Rb0.4FeSe are almost the same as those of nonammoniated K0.4FeSe and Rb0.4FeSe. The T-c of (NH3)(y)Cs0.4FeSe shows a negative pressure dependence. A clear correlation between T-c and lattice constant c is found for ammoniated metal-intercalated FeSe materials, suggesting a correlation between Fermi-surface nesting and superconductivity.
発行日
2012-09-30
出版物タイトル
Physical Review B
88巻
9号
出版者
The American Physical Society
ISSN
1098-0121
資料タイプ
学術雑誌論文
オフィシャル URL
http://link.aps.org/doi/10.1103/PhysRevB.88.094521
言語
English
OAI-PMH Set
岡山大学
著作権者
© 2013 The American Physical Society
論文のバージョン
publisher
査読
有り
DOI
Web of Sience KeyUT