二维阻挫Josephson结阵列中涡旋脱钉和蠕动  

Depinning and Creep of Vortices in Two-Dimensional Frustrated Josephson Junction Arrays

作　　者：刘焕[1] 周硙[1] 陈庆虎[1] 

机构地区：[1]浙江大学

出　　处：《稀有金属材料与工程》2008年第A04期1-4,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(10574107)资助

摘　　要：用电阻分流结动力学方法研究了二维阻挫Josephson结阵列中涡旋零温脱钉和低温蠕动规律。结果表明:在零温时,随电流升高,系统具有连续脱钉相变。在有限的低温时,利用电流、电压和温度的标度关系,发现涡旋在零温临界电流附近的蠕动规律是非Arrhenius型。By means of resistively shunted junction dynamics, we have numerically studied the depinning transition and creep motion of vortices in two-dimensional frustrated Josephson junction arrays. A continuous depinning transition is observed at zero temperature. By scaling analysis among the current, the voltage and temperature, a non-Arrhenius creep motion of vortices is found at low temperatures.

关 键 词：超导体 涡旋 脱钉 蠕动 

分 类 号：O511.2[理学—低温物理]