层状超导体Cu_(0.03)TaS_2中E～j特性的涡旋玻璃模型标度

Scaling of E～j Characteristics by Vortex Glass Model in Layerd Superconductor Cu_(0.03)TaS_2

在高温超导体中,涡旋玻璃理论可以很好地描述其中的涡旋玻璃相.选择合适的参数,就可以通过标度方程将磁场下混合态的E^j曲线标度到E+和E-两个分支上.但是,这个二阶相变模型对于层状超导体Cu0.03TaS2却不适用,原因为该体系中的弱钉扎,这可以从磁滞回线上的"峰效应"得到证明.

The vortex-glass theory has been successfully employed to describe the vortex phase state of high Tcsuperconductors. Its validity can be examined by scaling the current-voltage isotherms with appropriate exponents and universal scaling function. However, this second order phase transition model is not applicable for layered superconductor Cu0.03TaS2 due to its weak pinning, which could be proved by the peak effect in the M-H loops.