Low Temperature Physics: 47, 101 (2021); https://doi.org/10.1063/10.0003168
Fizika Nizkikh Temperatur: Volume 47, Number 2 (February 2021), p. 115-119    ( to contents , go back )

Two-band superconductivity in a Mo–Re alloy with an equal concentration of the components

V.Tarenkov1, A. Shapovalov2,3, O. Boliasova1, M. Belogolovskii2,4, and A. Kordyuk2,3

1O. O. Galkin Donetsk Institute for Physics and Engineering of the National Academy of Sciences of Ukraine Kyiv 03028, Ukraine

2G. V. Kurdyumov Institute for Metal Physics of the National Academy of Sciences of Ukraine, Kyiv 03142, Ukraine

3Kyiv Academic University, Kyiv 03142, Ukraine

4Vasyl’ Stus Donetsk National University, Vinnytsia 21021, Ukraine
E-mail: shapovalovap@gmail.com
pos Анотація:664

Received October 27, 2020, published online December 25, 2020

Abstract

An observed correlation between the critical temperature of a superconducting transition in high-temperature superconductors and a proximity of their electronic structure to the topological Lifshitz transition needs to be verified on simple model materials. Here we show that such an object could be a Mo–Re alloy with an equal concentration of constituent elements. We present new evidence of the presence of two energy gaps in this material, obtained using point-contact spectroscopy, and argue that the studied Mo–Re alloy can be used for implementing new quantum effects associated with the phase difference of electron wave functions from the different bands.

Key words: multiband superconductivity, topological Lifshitz transition, molybdenum-rhenium alloy, point-contact spectroscopy.

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