超导涡旋系统的非平衡态相变

Non-equilibrium Phase Transitions in Superconducting System

利用三维各向异性XY模型和电阻分流结动力学,研究了较强钉扎势下第二类层状超导体涡旋系统的非平衡态相变.结果发现,平衡态的涡旋玻璃相可在电流驱动下转变为运动玻璃相.在低温下系统经历了三次相变:随电流的增加,系统首先从运动涡旋玻璃相转变为运动Bragg玻璃相,再转变为运动Smectic相,最后融化为运动液体相.

The non-equilibrium phase transitions of vortex matter in type Ⅱ superconductor are studied within three-dimension anisotropic XY model by resistively-shunted junction （RSJ） dynamics. It is found that the static vortex glass phase can he transformed into the moving vortex glass in the presence of external current. At low temperature, the system undergoes three phase transitions. With the increase of the current, from the moving vortex glass, the system is first driven to the moving Bragg glass, then to the moving Smectic, and finally melts to the moving liquid.