Journal ArticleDOI
Iron-Based Layered Superconductor La[O1-xFx]FeAs (x = 0.05−0.12) with Tc = 26 K
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TLDR
It is reported that a layered iron-based compound LaOFeAs undergoes superconducting transition under doping with F- ions at the O2- site and exhibits a trapezoid shape dependence on the F- content.Abstract:
We report that a layered iron-based compound LaOFeAs undergoes superconducting transition under doping with F- ions at the O2- site. The transition temperature (Tc) exhibits a trapezoid shape dependence on the F- content, with the highest Tc of ∼26 K at ∼11 atom %.read more
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Journal ArticleDOI
Superconductivity in the PbO-type structure α-FeSe
F. C. Hsu,J. Y. Luo,Kuo-Wei Yeh,Ta-Kun Chen,T. W. Huang,Phillip M. Wu,Yong-Chi Lee,Yi-Lin Huang,Yan-Yi Chu,Der-Chung Yan,Maw-Kuen Wu +10 more
TL;DR: The observation of superconductivity with zero-resistance transition temperature at 8 K in the PbO-type α-FeSe compound is reported, indicating that this compound has the same, perhaps simpler, planar crystal sublattice as the layered oxypnictides.
Journal ArticleDOI
Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2.
TL;DR: The ternary iron arsenide (BaFe) becomes superconducting by hole doping, which was achieved by partial substitution of the barium site with potassium as mentioned in this paper, which was the first superconductivity discovery.
Journal ArticleDOI
Superconductivity at 55 K in Iron-Based F-Doped Layered Quaternary Compound Sm[O1-xFx] FeAs
Ren Zhi-An,Lu Wei,Yang Jie,Yi Wei,Shen Xiao-Li,Zheng-Cai,Che Guang-Can,Dong Xiao-Li,Sun Li-Ling,Zhou Fang,Zhao Zhong-Xian +10 more
TL;DR: In this article, the superconductivity of iron-based oxyarsenide Sm[O1-xFx]FeAs was reported, with the onset resistivity transition temperature at 55.0K and Meissner transition at 54.6 K. This compound has the same crystal structure as LaOFeAs with shrunk crystal lattices.
Journal ArticleDOI
Magnetic order close to superconductivity in the iron-based layered LaO1-xFxFeAs systems
Clarina Dela Cruz,Clarina Dela Cruz,Qingzhen Huang,J. W. Lynn,Jiying Li,Jiying Li,William Ratcliff,Jerel L. Zarestky,Herbert A. Mook,G. F. Chen,J. L. Luo,Nan Wang,Pengcheng Dai,Pengcheng Dai +13 more
TL;DR: The role of magnetism in the superconductivity that occurs when mobile 'electrons' or 'holes' are doped into the antiferromagnetic parent compounds of rare-earth iron-based oxide systems was investigated in this paper.
Journal ArticleDOI
The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides
TL;DR: The response of the worldwide scientific community to the discovery in 2008 of superconductivity at T c'='26'K in the Fe-based compound LaFeAsO1−x F x has been very enthusiastic.
References
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Journal ArticleDOI
Possible high Tc superconductivity in the Ba-La-Cu-O system
TL;DR: In this paper, Ba−La−Cu−O system, with the composition BaxLa5−xCu5O5(3−y) have been prepared in polycrystalline form, and samples with x=1 and 0.75,y>0, annealed below 900°C under reducing conditions, consist of three phases, one of them a perovskite-like mixed-valent copper compound.
Journal ArticleDOI
Superconductivity in a layered perovskite without copper
Yoshiteru Maeno,Hiroaki Hashimoto,K. Yoshida,S. Nishizaki,Toshizo Fujita,Johannes Georg Bednorz,Frank Lichtenberg +6 more
TL;DR: In this article, it was shown that the presence of copper is not a prerequisite for the existence of superconductivity in a layered perovskite, and that the low value of the superconducting transition temperature (Tc = 0.93 K) points towards a special role for copper in the high-temperature superconductors.
Journal ArticleDOI
Superconductivity in two-dimensional CoO2 layers.
Kazunori Takada,Hiroya Sakurai,Eiji Takayama-Muromachi,Fujio Izumi,Ruben A. Dilanian,Takayoshi Sasaki +5 more
TL;DR: There is a marked resemblance in superconducting properties between the present material and high-Tc copper oxides, suggesting that the two systems have similar underlying physics.
Journal ArticleDOI
Iron-Based Layered Superconductor: LaOFeP
Yoichi Kamihara,Hidenori Hiramatsu,Masahiro Hirano,Ryuto Kawamura,Hiroshi Yanagi,Toshio Kamiya,Hideo Hosono +6 more
TL;DR: Magnetic and electrical resistivity measurements verify the occurrence of the superconducting transition at approximately 4 K in an iron-based layered oxy-pnictide LaOFeP.
Journal ArticleDOI
Spin-triplet superconductivity in Sr2RuO4 identified by 17O knight shift
Kenji Ishida,Hidekazu Mukuda,Yoshio Kitaoka,Kunisuke Asayama,Zhiqiang Mao,Y. Mori,Yoshiteru Maeno +6 more
TL;DR: In this paper, the authors used 17O NMR to determine the spin susceptibility of the layered oxide superconductor Sr2RuO4 and showed no change in spin susceptibility on passing through the superconducting transition temperature.