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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2020, Volume 112, Issue 12, Pages 822–829
DOI: https://doi.org/10.31857/S1234567820240076 (Mi jetpl6327) 		 
This article is cited in 11 scientific papers (total in 11 papers)

CONDENSED MATTER

Multiple andreev reflection spectroscopy of optimally doped Ba(Fe,Ni)$_2$As$_2$ superconducting pnictides

T. E. Kuzmichevaa, S. A. Kuzmichevba, K. S. Pervakova, V. A. Vlasenkoa

a Lebedev Physical Institute, Russian Academy of Sciences, Moscow, 119991 Russia
b Faculty of Physics, Moscow State University, Moscow, 119991 Russia
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DOI: https://doi.org/10.31857/S1234567820240076
Abstract: The current-voltage characteristics and dynamic conductance spectra of the SnS junction in Ba(Fe,Ni)$_2$As$_2$ superconducting pnictide of almost optimal composition have been obtained. A slight slope of the electronic density of states near the Fermi level has been detected. Using multiple Andreev reflection spectroscopy, we have directly determined the values and the temperature dependences of the two superconducting order parameters and estimated their anisotropy. We have shown that the obtained temperature dependences of Andreev excess current and Andreev zero-bias conductance could be fitted with a two-band model, and estimated the partial conductances of the two effective bands where the large and the small gaps are developed.
Funding agency Grant number
Russian Science Foundation 19-72-00196
Russian Foundation for Basic Research 19-02-00888
The Andreev spectroscopy measurements were supported by the Russian Science Foundation (project no. 19-72-00196); crystal growth and characterization of the used single crystals were supported by the Russian Foundation for Basic Research (project no. 19-02-00888).
Received: 03.11.2020
Revised: 10.11.2020
Accepted: 10.11.2020
English version:
Journal of Experimental and Theoretical Physics Letters, 2020, Volume 112, Issue 12, Pages 786–792
DOI: https://doi.org/10.1134/S0021364020240066
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: T. E. Kuzmicheva, S. A. Kuzmichev, K. S. Pervakov, V. A. Vlasenko, “Multiple andreev reflection spectroscopy of optimally doped Ba(Fe,Ni)$_2$As$_2$ superconducting pnictides”, Pis'ma v Zh. Èksper. Teoret. Fiz., 112:12 (2020), 822–829; JETP Letters, 112:12 (2020), 786–792
Citation in format AMSBIB
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\vol 112
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    • This publication is cited in the following 11 articles:
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