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arXiv · 1901.06194

Effect of electron irradiation and Pr doping on the charge transport in YBCO single crystals

R. V. Vovk·G. Ya. Khadzhai·O. V. Dobrovolskiy
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Abstract

The influence of irradiation by electrons with energies of $0.5-2.5$\,MeV at temperatures of about $10$\,K on the basal-plane resistivity of the YBa$_2$Cu$_3$O$_{7-δ}$ single crystals is investigated in the range from $T_c$ to $300$\,K. The resistivity temperature dependence is determined by defects arising due to the irradiation. These defects directly affect the superconducting transition, decreasing $T_c$ and increasing the transition width without significant distortions of its shape. The resulting defects also lead to an increase in the Debye temperature due to a reduction of the anisotropy, and a noticeable increase in the scattering by phonons in the sample. The excess conductivity does not change with the irradiation used.

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R. V. Vovk, G. Ya. Khadzhai, O. V. Dobrovolskiy. 2019-01-18. Effect of electron irradiation and Pr doping on the charge transport in YBCO single crystals. https://doi.org/10.1016/j.ssc.2018.07.005

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