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Uspekhi Fizicheskikh Nauk, 2017, Volume 187, Number 4, Pages 450–462
DOI: https://doi.org/10.3367/UFNr.2016.10.038002 (Mi ufn5851) 		 
This article is cited in 18 scientific papers (total in 18 papers)

CONFERENCES AND SYMPOSIA. 100th ANNIVERSARY OF THE BIRTH OF V L GINZBURG

On the structure of the superconducting order parameter in high-temperature Fe-based superconductors

T. E. Kuzmichevaa, A. V. Muratova, S. A. Kuzmichevab, A. V. Sadakova, Yu. A. Aleshchenkoac, V. A. Vlasenkoa, V. P. Martovitskya, K. S. Pervakovad, Yu. F. Eltseva, V. M. Pudalovae

a Lebedev Physical Institute, Russian Academy of Sciences, Moscow
b Lomonosov Moscow State University, Faculty of Physics
c National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow
d International Laboratory of High Magnetic Fields and Low Temperatures
e National Research University: Higher School of Economics, Moscow
Full-text PDF (941 kB) Citations (18)
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DOI: https://doi.org/10.3367/UFNr.2016.10.038002
Abstract: We discuss the synthesis, characterization, and comprehensive study of Ba-122 single crystals with various substitutions and various superconducting transition temperatures. We use five complementary techniques to obtain a self-consistent set of data on the superconducting properties of Ba-122. A major conclusion of our work is the coexistence of two superconducting condensates differing in the electron–boson coupling strength. The two gaps that develop in distinct Fermi surface sheets are nodeless in the $k_xk_y$ plane and exhibit s-wave symmetry; the two-band model suffices for the description of the main parameters of the superconducting state. A moderate interband coupling and a considerable Coulomb repulsion in the description of the two-gap superconducting state of barium pnictides favor the ${\rm s}^{++}$ model.
Funding agency Grant number
Russian Science Foundation 16-12-10507
16-42-01100
Ministry of Education and Science of the Russian Federation 02.a03.21.0005
The authors acknowledge the Russian Science Foundation (projects no. 16-12-10507 and 16-42-01100) and also the MEPhI Academic Excellence Project (contract No. 02.a03.21.0005) for financial support.
Received: December 7, 2016
Accepted: October 5, 2016
English version:
Physics–Uspekhi, 2017, Volume 60, Issue 4, Pages 419–429
DOI: https://doi.org/10.3367/UFNe.2016.10.038002
Bibliographic databases:
Document Type: Article
PACS: 74.25.-q, 74.25.nd, 74.25.Ha, 74.45.+c, 74.70.Xa
Language: Russian
Citation: T. E. Kuzmicheva, A. V. Muratov, S. A. Kuzmichev, A. V. Sadakov, Yu. A. Aleshchenko, V. A. Vlasenko, V. P. Martovitsky, K. S. Pervakov, Yu. F. Eltsev, V. M. Pudalov, “On the structure of the superconducting order parameter in high-temperature Fe-based superconductors”, UFN, 187:4 (2017), 450–462; Phys. Usp., 60:4 (2017), 419–429
Citation in format AMSBIB
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