Hyper-expanded interlayer separations in superconducting barium intercalates of FeSe.
Kirill V. Yusenko,Kirill V. Yusenko,Jonas Sottmann,Hermann Emerich,Wilson A. Crichton,Lorenzo Malavasi,Serena Margadonna +6 more
TLDR
The values of Tc are primarily dependent on Ba content, and are further modulated by the interlayer spacing through facile intercalation and deintercalation of ammonia.About:
This article is published in Chemical Communications.The article was published on 2015-04-09 and is currently open access. It has received 26 citations till now. The article focuses on the topics: Intercalation (chemistry) & Barium.read more
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The intercalation chemistry of layered iron chalcogenide superconductors
TL;DR: In this paper, the authors review the intercalation chemistry of FeSe and FeS superconductors and discuss their synthesis, structure, and physical properties, including charge doping, structural distortions, and Fermi surface reconstruction.
Journal ArticleDOI
Preformed Cooper Pairs in Layered FeSe-Based Superconductors.
B. L. Kang,M. Z. Shi,S. J. Li,Hengyan Wang,Qian Zhang,D. Zhao,J. Li,D. W. Song,L. Zheng,L. P. Nie,Tao Wu,Xianhui Chen +11 more
TL;DR: It is confirmed that strong phase fluctuation is an important character in the 2D iron-basedsuperconductors as widely observed in high-T_{c} cuprate superconductors.
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Superconductivity in alkali metal intercalated iron selenides.
TL;DR: The present paper reviews scientific work concerning methods of synthesis and crystal growth, structural and superconducting properties as well as pressure investigations, and assumes the iron vacancy ordering, linked with a long-range magnetic order and a mesoscopic phase separation, to be an intrinsic property of the system.
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Chemical Intercalations in Layered Transition Metal Chalcogenides: Syntheses, Structures, and Related Properties
Zhongnan Guo,Fan Sun,Wenxia Yuan +2 more
TL;DR: In this paper, the authors introduce and summarize the latest advances in chemical intercalation and the role of these spacing layers in transition metal chalcogenides, and their relation to relevant properties.
References
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Phase relations in K x Fe 2-y Se 2 and the structure of superconducting K x Fe 2 Se 2 via high-resolution synchrotron diffraction
Daniel P. Shoemaker,Duck Young Chung,Helmut Claus,Melanie C. Francisco,Sevda Avci,Anna Llobet,Mercouri G. Kanatzidis,Mercouri G. Kanatzidis +7 more
TL;DR: In this article, the authors examined the structure of the superconducting phase of iron selenides and found four distinct phases: semiconducting, metallic, iron-rich, and oxidized.
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Ammonia-Rich High-Temperature Superconducting Intercalates of Iron Selenide Revealed through Time-Resolved in Situ X-ray and Neutron Diffraction
Stefan J. Sedlmaier,Simon J. Cassidy,Richard G. Morris,Michael Drakopoulos,Christina Reinhard,Saul J. Moorhouse,Dermot O'Hare,Pascal Manuel,Dmitry D. Khalyavin,Simon J. Clarke +9 more
TL;DR: Development of a technique for following in situ the reactions of solids with alkali metal/ammonia solutions, using time-resolved X-ray diffraction methods, reveals high-temperature superconducting ammonia-rich intercalates of iron selenide which reversibly absorb and desorb ammonia around ambient temperatures.
Journal ArticleDOI
Superconductivity and phase instability of NH 3 -free Na-intercalated FeSe 1- z S z
TL;DR: The modulation of interlayer spacing reveals the versatile evolution of structural stability and superconductivity in these intercalates.
Journal ArticleDOI
Superconductivity in (NH 3 ) y Cs 0.4 FeSe
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 +12 more
TL;DR: In this paper, a superconducting transition temperature (T-c) as high as 31.2 K was obtained for ammoniated metal-intercalated FeSe materials, suggesting a correlation between Fermi-surface nesting and superconductivity.
Journal Article
Unified picture of the doping dependence of superconducting transition temperatures in alkali metal/ammonia intercalated FeSe
TL;DR: In this article, the authors constructed eight-orbital models from ab initio density functional theory calculations for the intercalated FeSe class of materials and showed that the electron doping enhances the superconducting pairing, which is of ${s}_{\ifmmode\pm\else\textpm\fi{}}$ symmetry.