Superconductivity in (NH3)yCs0.4FeSe

Lu Zheng; Masanari Izumi; Yusuke Sakai; Ritsuko Eguchi; Hidenori Goto; Yasuhiro Takabayashi; Takashi Kambe; Taiki Onji; Shingo Araki; Tatsuo C. Kobayashi; Jungeun Kim; Akihiko Fujiwara; Yoshihiro Kubozono

doi:10.1103/PhysRevB.88.094521

Superconductivity in (NH₃)_yCs_0.4FeSe

Lu Zheng, Masanari Izumi, Yusuke Sakai, Ritsuko Eguchi, Hidenori Goto, Yasuhiro Takabayashi, Takashi Kambe, Taiki Onji, Shingo Araki, Tatsuo C. Kobayashi, Jungeun Kim, Akihiko Fujiwara, Yoshihiro Kubozono

Research output: Contribution to journal › Article › peer-review

48 Citations (Scopus)

Abstract

Alkali-metal-intercalated FeSe materials, (NH₃) _yM_0.4FeSe (M: K, Rb, and Cs), have been synthesized using the liquid NH₃ technique. (NH₃)_yCs _0.4FeSe 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 Cs_0.4FeSe. The T_cs of (NH ₃)_yK_0.4FeSe and (NH₃) _yRb_0.4FeSe are almost the same as those of nonammoniated K_0.4FeSe and Rb_0.4FeSe. The T_c of (NH ₃)_yCs_0.4FeSe 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.

Original language	English
Article number	094521
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	88
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.88.094521
Publication status	Published - 2013 Sept 30
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Superconductivity in (NH3)yCs0.4FeSe",

abstract = "Alkali-metal-intercalated FeSe materials, (NH3) yM0.4FeSe (M: K, Rb, and Cs), have been synthesized using the liquid NH3 technique. (NH3)yCs 0.4FeSe shows a superconducting transition temperature (T c) as high as 31.2 K, which is higher by 3.8 K than the Tc of nonammoniated Cs0.4FeSe. The Tcs of (NH 3)yK0.4FeSe and (NH3) yRb0.4FeSe are almost the same as those of nonammoniated K0.4FeSe and Rb0.4FeSe. The Tc of (NH 3)yCs0.4FeSe shows a negative pressure dependence. A clear correlation between Tc and lattice constant c is found for ammoniated metal-intercalated FeSe materials, suggesting a correlation between Fermi-surface nesting and superconductivity.",

author = "Lu Zheng and Masanari Izumi and Yusuke Sakai and Ritsuko Eguchi and Hidenori Goto and Yasuhiro Takabayashi and Takashi Kambe and Taiki Onji and Shingo Araki and Kobayashi, {Tatsuo C.} and Jungeun Kim and Akihiko Fujiwara and Yoshihiro Kubozono",

year = "2013",

month = sep,

day = "30",

doi = "10.1103/PhysRevB.88.094521",

language = "English",

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journal = "Physical Review B - Condensed Matter and Materials Physics",

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T1 - Superconductivity in (NH3)yCs0.4FeSe

AU - Zheng, Lu

AU - Izumi, Masanari

AU - Sakai, Yusuke

AU - Eguchi, Ritsuko

AU - Goto, Hidenori

AU - Takabayashi, Yasuhiro

AU - Kambe, Takashi

AU - Onji, Taiki

AU - Araki, Shingo

AU - Kobayashi, Tatsuo C.

AU - Kim, Jungeun

AU - Fujiwara, Akihiko

AU - Kubozono, Yoshihiro

PY - 2013/9/30

Y1 - 2013/9/30

N2 - Alkali-metal-intercalated FeSe materials, (NH3) yM0.4FeSe (M: K, Rb, and Cs), have been synthesized using the liquid NH3 technique. (NH3)yCs 0.4FeSe shows a superconducting transition temperature (T c) as high as 31.2 K, which is higher by 3.8 K than the Tc of nonammoniated Cs0.4FeSe. The Tcs of (NH 3)yK0.4FeSe and (NH3) yRb0.4FeSe are almost the same as those of nonammoniated K0.4FeSe and Rb0.4FeSe. The Tc of (NH 3)yCs0.4FeSe shows a negative pressure dependence. A clear correlation between Tc and lattice constant c is found for ammoniated metal-intercalated FeSe materials, suggesting a correlation between Fermi-surface nesting and superconductivity.

AB - Alkali-metal-intercalated FeSe materials, (NH3) yM0.4FeSe (M: K, Rb, and Cs), have been synthesized using the liquid NH3 technique. (NH3)yCs 0.4FeSe shows a superconducting transition temperature (T c) as high as 31.2 K, which is higher by 3.8 K than the Tc of nonammoniated Cs0.4FeSe. The Tcs of (NH 3)yK0.4FeSe and (NH3) yRb0.4FeSe are almost the same as those of nonammoniated K0.4FeSe and Rb0.4FeSe. The Tc of (NH 3)yCs0.4FeSe shows a negative pressure dependence. A clear correlation between Tc and lattice constant c is found for ammoniated metal-intercalated FeSe materials, suggesting a correlation between Fermi-surface nesting and superconductivity.

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Superconductivity in (NH₃)_yCs_0.4FeSe

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