Pressure Study of Superconducting Oxypnictide LaFePO
Kazumi Igawa,Hironari Okada,Kazunobu Arii,Hiroki Takahashi,Yoichi Kamihara,Masahiro Hirano,Hideo Hosono,Satoshi Nakano,Takumi Kikegawa +8 more
TLDR
In this paper, electrical resistivity and magnetic susceptibility measurements under high pressure were performed on an iron-based superconductor LaFePO, where a steep increase in superconducting transition temperature (Tc) with dTc/dP > 4 K/GPa was observed.Abstract:
Electrical resistivity and magnetic susceptibility measurements under high pressure were performed on an iron-based superconductor LaFePO A steep increase in superconducting transition temperature (Tc) of LaFePO with dTc/dP > 4 K/GPa to a maximum of 88 K for P = 08 GPa was observed These results are similar to isocrystalline LaFeAsO1-xFx system reported previously X-ray diffraction measurements were also performed under high pressure up to 10 GPa, where linear compressibility ka and kc are presentedread more
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Contrasting Pressure Effects in Sr2VFeAsO3 and Sr2ScFePO3
Hisashi Kotegawa,Takayuki Kawazoe,Hideki Tou,Keizo Murata,Hiraku Ogino,Kohji Kishio,Jun-ichi Shimoyama +6 more
TL;DR: In this paper, the resistivity measurements under pressure of two Fe-based superconductors with a thick perovskite oxide layer, Sr2VFeAsO3 and Sr2ScFePO3, were reported.
Posted Content
Ab-initio theory of Iron based superconductors
F. Essenberger,Antonio Sanna,Pawel Buczek,Arthur Ernst,Arthur Ernst,Leonid M. Sandratskii,E. K. U. Gross +6 more
TL;DR: In this article, the authors report the first principles of superconducting critical temperature and superconding properties of Fe-based superconductors taking into account on the same footing phonon, charge and spin-fluctuation mediated Cooper pairing.
Journal ArticleDOI
Magneto-structural coupling and harmonic lattice dynamics in CaFe2As2 probed by Mössbauer spectroscopy
TL;DR: In this paper, a detailed M?ssbauer spectroscopy study of the structural and magnetic properties of the undoped parent compound CaFe2As2 single crystal was presented, and it was shown that the magneto-structural phase transition is clearly first order in nature and also deduced the compressibility of our sample to be 1.67? 10? 2GPa? 1.
Journal ArticleDOI
Hybridization and suppression of superconductivity in CeFeAsO 1-y: Pressure and temperature dependence of the electronic structure
Hitoshi Yamaoka,Ignace Jarrige,Atsushi Ikeda-Ohno,Satoshi Tsutsui,Jung-Fu Lin,Nao Takeshita,Kiichi Miyazawa,Kiichi Miyazawa,Akira Iyo,Akira Iyo,Hijiri Kito,Hiroshi Eisaki,N. Hiraoka,Hirofumi Ishii,Ku Ding Tsuei +14 more
TL;DR: In this paper, the authors investigated the pressure and temperature dependence of the electronic structure of superconducting (SC) and non-SC (non-CeFeAsO)) compounds using two complementary hard x-ray spectroscopic probes.
Journal ArticleDOI
Pressure studies of (La, Sm)FeAsO1−xFx and LaFePO
TL;DR: In this paper, pressure dependence on superconducting transition temperature (T c ) was examined for iron-based superconductor LaFeAsO 1− x F x, SmFeAs O 1−x F x and LaFePO.
References
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Journal ArticleDOI
Iron-Based Layered Superconductor La[O1-xFx]FeAs (x = 0.05−0.12) with Tc = 26 K
TL;DR: 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.
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
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
Superconductivity at 43 K in an iron-based layered compound LaO 1-x F x FeAs
TL;DR: It is reported that increasing the pressure causes a steep increase in the onset Tc of F-doped LaOFeAs, to a maximum of ∼43 K at ∼4 GPa, which is the highest Tc reported to date.
Journal ArticleDOI
Superconductivity at 54 K in F-Free NdFeAsO1-y
TL;DR: In this paper, a series of oxygen-deficient, fluorine-free polycrystalline samples with nominal chemical formula NdFeAsO 1- y using high-pressure technique were synthesized.