Evolution of the excess conductivity in YBCO single crystals is investigated after their step-by-step irradiation with fast electrons. The dependence of the coherence length ξ_c(0) along the c-axis on the irradiation dose dependence is obtained. It is revealed that an increase of the irradiation dose from 1.4 to 8.8 × 10¹⁸ cm${}^{-2}$ leads to a considerable extension of the temperature range of the excess conductivity. This is accompanied by a factor of about 1.5 increase of ξ_c(0) and a shift ot the 2D-3D crossover point in temperature.

中文翻译：

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快速电子辐照后YBCO单晶中过量电导率的演变

在用快速电子逐步照射后，研究了YBCO单晶中过量电导率的演变。相干长度的依赖性ξ _Ç（0）沿Ç -轴上获得的照射剂量依赖性。结果表明，照射剂量从1.4增加到8.8×10 ¹⁸  cm${}^{-2}$导致过量电导率的温度范围大大扩展。这是伴随着约1.5的增加因子ξ _Ç（0）和OT的温度2D-3D交叉点的偏移。