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ID 51905
Author
Zheng, Lu
Izumi, Masanari
Sakai, Yusuke
Takabayashi, Yasuhiro
Onji, Taiki
Araki, Shingo
Kim, Jungeun
Fujiwara, Akihiko
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
OAI-PMH Set
岡山大学
Copyright Holders
© 2013 The American Physical Society
File Version
publisher
Refereed
True
DOI
Web of Sience KeyUT