Current transport of the [001]-tilt low-angle grain boundary in high temperature superconductors
Current transport of the [001]-tilt low-angle grain boundary in high temperature superconductors
复制标题
DOI：
10.1063/1.4838697
复制
发表时间：
2013-12
影响因子：
4
通讯作者：
Donghua Yue;Xingyi Zhang;Jùn Zhou;Youhe Zhou
中科院分区：
文献类型：
--
作者：
Donghua Yue;Xingyi Zhang;Jùn Zhou;Youhe Zhou
晶界电流输运是影响高温超导体宏超电流特性的重要因素之一。Van der Laan等人的研究成果。[物理。莱特牧师。103,027005(2009年)]提出了临界电流密度与应变的关系，并用幂函数进行了拟合，并得到了大量实验测量的验证。本文根据位错的应变能，对[001]-倾斜小角度晶界中的电流输运进行了理论分析。得到了与拟合函数形式相似、参数物理特性明显、数值接近文献报道的解析表达式。
Current transport in grain boundary is one of the crucial factors which can affect the macro-supercurrent characteristics of the high temperature superconductors. van der Laan et al. [Phys. Rev. Lett. 103, 027005 (2009)] presented the strain dependence of the critical current density with a power-law fitting function, which has been verified by many experimental measurements. Here, we present a theoretical analysis of current transport in the [001]-tilt low angle grain boundary according to the strain energy of dislocation. An analytical expression is obtained which has the similar form of the fitting function, and in which the physical characteristics of parameters are distinct, and their values are close to the reports in literature.