Journal ArticleDOI
Effect of ion irradiation on surface morphology and superconductivity of BaFe2(As1-xPx)2 films
Dario Daghero,Mauro Tortello,Laura Gozzelino,Laura Gozzelino,Renato Gonnelli,Takafumi Hatano,Takahiko Kawaguchi,Hiroshi Ikuta +7 more
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In this article, the effects of BaFe2(As(1-x)P(x))2 with x @ 0.2 (optimal doping) on MgO single-crystal substrates were studied.About:
This article is published in Applied Surface Science.The article was published on 2017-02-15. It has received 8 citations till now. The article focuses on the topics: Electrical resistivity and conductivity & Andreev reflection.read more
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Fe-based superconducting thin films on metallic substrates: Growth, characteristics, and relevant properties
TL;DR: In this paper, a review of the recent development of Fe-based superconductors on technical metallic substrates and their superconducting properties are presented and the performance gap with respect to films on single crystals is discussed.
Journal ArticleDOI
Fe-based superconducting thin films on metallic substrates: growth, characteristics and relevant properties
TL;DR: In this paper, a review of the recent development of Fe-based superconductors on technical metallic substrates and their superconducting properties are presented and the performance gap with respect to films on single crystals is discussed.
Journal ArticleDOI
Ambipolar suppression of superconductivity by ionic gating in optimally doped BaFe 2 ( As , P ) 2 ultrathin films
Erik Piatti,Takafumi Hatano,Dario Daghero,Francesco Galanti,Claudio Gerbaldi,Salvatore Antonio Guastella,Chiara Portesi,I. Nakamura,R. Fujimoto,Kazumasa Iida,Hiroshi Ikuta,Renato Gonnelli +11 more
TL;DR: In this article, the effect of ionic gate polarization on superconductivity in the Ba-122 family of iron-based compounds has been studied in the presence of charge doping and isovalent P substitution.
Journal ArticleDOI
Ambipolar suppression of superconductivity by ionic gating in optimally-doped BaFe2(As,P)2 ultrathin films.
Erik Piatti,Takafumi Hatano,Dario Daghero,Francesco Galanti,Claudio Gerbaldi,Salvatore Antonio Guastella,Chiara Portesi,I. Nakamura,R. Fujimoto,Kazumasa Iida,Hiroshi Ikuta,Renato Gonnelli +11 more
TL;DR: In this article, the effect of ionic gate polarization on superconductivity in the Ba-122 family of iron-based compounds was studied and it was shown that the polarization of the gate induces modulations to the normal state transport properties that can be mainly attributed to surface charge doping.
Journal ArticleDOI
Decoupling of critical temperature and superconducting gaps in irradiated films of a Fe-based superconductor
Dario Daghero,Mauro Tortello,Giovanni Ummarino,Giovanni Ummarino,Erik Piatti,Gianluca Ghigo,Gianluca Ghigo,Takafumi Hatano,Takahiko Kawaguchi,Hiroshi Ikuta,Renato Gonnelli +10 more
TL;DR: Daghero et al. as mentioned in this paper reported on direct measurements of the energy gaps (carried out by means of point-contact Andreev reflection spectroscopy, PCARS) and of the critical temperature in thin, optimally doped, epitaxial films of BaFe2(As 1−xPx)2 irradiated with 250-MeV Au ions.
References
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Journal ArticleDOI
Theory of dirty superconductors
TL;DR: In this article, a B.C.S. theory for very dirty superconductors is sketched, where elastic scattering from physical and chemical impurities is large compared with the energy gap.
Journal ArticleDOI
Line nodes in the energy gap of superconducting BaFe 2 ( As 1 − x P x ) 2 single crystals as seen via penetration depth and thermal conductivity
Kenichiro Hashimoto,Kenichiro Hashimoto,Minoru Yamashita,Shigeru Kasahara,Y. Senshu,Norihito Nakata,S. Tonegawa,K. Ikada,Alessandro Serafin,Antony Carrington,Takahito Terashima,Hiroaki Ikeda,Takasada Shibauchi,Yuji Matsuda +13 more
TL;DR: In this article, the authors report magnetic penetration depth and thermal conductivity data for high-quality single crystals of BaFe$_2$(As$1-x}$P$_{x}/P$1.
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Enhancement of critical current density in Co-doped BaFe 2 As 2 with columnar defects introduced by heavy-ion irradiation
Yasuyuki Nakajima,Yuji Tsuchiya,Toshihiro Taen,Tsuyoshi Tamegai,Satoru Okayasu,Masato Sasase +5 more
TL;DR: In this paper, columnar defects were confirmed by transmission electron microscopy, and their density was about 40% of the irradiation dose, and they were found to suppress vortex creep rates.
Journal ArticleDOI
Nodal superconducting-gap structure in ferropnictide superconductor BaFe 2 (As 0.7 P 0.3 ) 2
TL;DR: In this paper, angle-resolved photo-emission spectroscopy measurements indicate that the iron-based superconductor BaFe2(As07P03)2 exhibits an unusual nodal s-wave pairing.
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Disorder-induced transition between s± and s++ states in two-band superconductors
D.V. Efremov,Maxim M. Korshunov,Maxim M. Korshunov,Maxim M. Korshunov,Oleg V. Dolgov,Alexandre Avraamovitch Golubov,Peter Hirschfeld +6 more
TL;DR: In this paper, the authors studied disorder in two-band superconductors and showed that the suppression of Tc can be described by a single parameter depending on the intraband and interband impurity scattering rates.