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Title: High-temperature superconductivity in two-band materials with interband pairing

Abstract

The Eliashberg theory generalized using peculiar properties of two-band electron–phonon (EP) systems is employed for studying T{sub c} in two-band materials (in particular, pnictides). In view of probably strong EP coupling, we take into account pairing within the entire width of the electron band, not only in a narrow layer at the Fermi surface. It is found that the effect of pairing of electrons belonging to different bands is a decisive factor for manifestation of the effect of high T{sub c} in these materials. It is shown that in materials analogous to pnictides, high T{sub c} values are reproduced by the two-band spectral function of electron–phonon interaction. The existence of one more family of two-band high-temperature materials with a superconducting transition temperature T{sub c} comparable to that in cuprates is predicted.

Authors:
 [1]
  1. National Research Nuclear University MEPhI (Russian Federation)
Publication Date:
OSTI Identifier:
22472199
Resource Type:
Journal Article
Journal Name:
Journal of Experimental and Theoretical Physics
Additional Journal Information:
Journal Volume: 121; Journal Issue: 1; Other Information: Copyright (c) 2015 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-7761
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COMPARATIVE EVALUATIONS; COUPLING; CUPRATES; ELECTRONIC STRUCTURE; ELECTRON-PHONON COUPLING; ELECTRONS; FERMI LEVEL; HIGH-TC SUPERCONDUCTORS; LAYERS; PHONONS; PNICTIDES; SPECTRAL FUNCTIONS; SUPERCONDUCTIVITY; TRANSITION TEMPERATURE

Citation Formats

Mazur, E. A., E-mail: eugen-mazur@mail.ru, and Dubovik, V. M. High-temperature superconductivity in two-band materials with interband pairing. United States: N. p., 2015. Web. doi:10.1134/S1063776115060114.
Mazur, E. A., E-mail: eugen-mazur@mail.ru, & Dubovik, V. M. High-temperature superconductivity in two-band materials with interband pairing. United States. https://doi.org/10.1134/S1063776115060114
Mazur, E. A., E-mail: eugen-mazur@mail.ru, and Dubovik, V. M. 2015. "High-temperature superconductivity in two-band materials with interband pairing". United States. https://doi.org/10.1134/S1063776115060114.
@article{osti_22472199,
title = {High-temperature superconductivity in two-band materials with interband pairing},
author = {Mazur, E. A., E-mail: eugen-mazur@mail.ru and Dubovik, V. M.},
abstractNote = {The Eliashberg theory generalized using peculiar properties of two-band electron–phonon (EP) systems is employed for studying T{sub c} in two-band materials (in particular, pnictides). In view of probably strong EP coupling, we take into account pairing within the entire width of the electron band, not only in a narrow layer at the Fermi surface. It is found that the effect of pairing of electrons belonging to different bands is a decisive factor for manifestation of the effect of high T{sub c} in these materials. It is shown that in materials analogous to pnictides, high T{sub c} values are reproduced by the two-band spectral function of electron–phonon interaction. The existence of one more family of two-band high-temperature materials with a superconducting transition temperature T{sub c} comparable to that in cuprates is predicted.},
doi = {10.1134/S1063776115060114},
url = {https://www.osti.gov/biblio/22472199}, journal = {Journal of Experimental and Theoretical Physics},
issn = {1063-7761},
number = 1,
volume = 121,
place = {United States},
year = {Wed Jul 15 00:00:00 EDT 2015},
month = {Wed Jul 15 00:00:00 EDT 2015}
}