Low Temperature Physics: 44, 860 (2018); https://doi.org/10.1063/1.5049172
Fizika Nizkikh Temperatur: Volume 44, Number 8 (August 2018), p. 1100-1103    ( to contents , go back )

Effect of electron irradiation on the scattering of carriers in YBa2Cu3O7–δ single crystalls

N.A. Azarenkov1, V.N. Voevodin1,2, R.V. Vovk1, and G.Ya. Khadzhai1

1V.N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv 61022, Ukraine
E-mail: rvvovk2017@gmail.com; gkhadjai@univer.kharkov.ua

2Institute of Solid State Physics, Materials Science and Technologies NCS “Kharkov Institute of Physics and Technology” , Str. Academic 1, Kharkov, 61108, Ukraine

Received March 13, 2018

Abstract

The effect of electron irradiation at T ≲ 10 K (energy 0.5–2.5 MeV, dose 1018 cm–2) on the parameters of charge carrier scattering and superconducting transition characteristics in an optimally doped Y–Ba–Cu–O single crystal (Tc = 91.74 K) was studied. Irradiation with electrons leads to a significant increase in the residual resistance and the Debye temperature. The latter is associated with the isotropization of the phonon spectrum due to an increase in the concentration of defects. Irradiation also leads to a decrease in Tc and an increase in the coherence length.

PACS: 74.72.–h Cuprate superconductors;
PACS: 74.62.Dh Effects of crystal defects, doping and substitution;
PACS: 74.72.Ek Electron-doped.

Key words: high-temperature superconductors, electrical resistivity, irradiation, electrons, phonons, Debye temperature, superconducting transition.

Published online: June 27, 2018

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