We have studied how the current-voltage (IV) characteristic below the critical temperature gets affected by electron doping in Eu_1-xCe_xBa₂Cu₃O_7-δ (ECBCO) superconducting systems. The critical current density as a function of T has been extracted in the vicinity but below the critical temperature. Variation of the low critical current density with temperature in the limited range of T has been explained by using an exponential dependence on T. Possibility of the Ambegaokar-Baratoff (AB) to Ginzburg-Landau (GL) crossover has been explored. An exponential nature of the variation in all electron doped superconductors with large angular separation between grain boundaries is attributed to the existence of the vortex fluid state in a narrow range of T.

我们研究了Eu _{1- x} Ce _x Ba ₂ Cu ₃ O _7-δ  (ECBCO) 超导系统中电子掺杂如何影响临界温度以下的电流-电压 ( IV ) 特性。作为T函数的临界电流密度已在临界温度附近但低于临界温度提取。在T的有限范围内，低临界电流密度随温度的变化已通过使用对T的指数依赖性来解释. Ambegaokar-Baratoff (AB) 到 Ginzburg-Landau (GL) 交叉的可能性已经被探索。在晶界之间具有大角度间隔的所有电子掺杂超导体中变化的指数性质归因于在T的窄范围内存在涡流流体状态。