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

研究成果: Article › 査読

48 被引用数 (Scopus)

抄録

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.

本文言語	English
論文番号	094521
ジャーナル	Physical Review B - Condensed Matter and Materials Physics
巻	88
号	9
DOI	https://doi.org/10.1103/PhysRevB.88.094521
出版ステータス	Published - 2013 9月 30
外部発表	はい

ASJC Scopus subject areas

電子材料、光学材料、および磁性材料
凝縮系物理学

文献へのアクセス

10.1103/PhysRevB.88.094521

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引用スタイル

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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.",

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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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