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ID 51905
Author
Zheng, Lu
Izumi, Masanari
Sakai, Yusuke
Eguchi, Ritsuko Kaken ID
Goto, Hidenori Kaken ID
Takabayashi, Yasuhiro
Kambe, Takashi Kaken ID researchmap
Onji, Taiki
Araki, Shingo
Kim, Jungeun
Fujiwara, Akihiko
Kubozono, Yoshihiro Kaken ID publons
Abstract
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.
Published Date
2012-09-30
Publication Title
Physical Review B
Volume
volume88
Issue
issue9
Publisher
The American Physical Society
ISSN
1098-0121
Content Type
Journal Article
Official Url
http://link.aps.org/doi/10.1103/PhysRevB.88.094521
language
英語
Copyright Holders
© 2013 The American Physical Society
File Version
publisher
Refereed
True
DOI
Web of Science KeyUT