Dynamics of vortex glass phase in strongly type-II superconductors
Dynamics of vortex glass phase in strongly type-II superconductors
复制标题
DOI：
10.1103/physrevb.78.104501
复制
发表时间：
2008-02
影响因子：
3.7
通讯作者：
Qing-Hu Chen
中科院分区：
文献类型：
--
作者：
Qing-Hu Chen
在三维$XY$模型下研究了强无序强II型超导体中的涡旋动力学。Olsson [Phys. Rev. Lett. 91，077002（2003）]和Kawamura [Phys. Rev. B 68，220502（R）（2003）]中，通过进行大规模动力学模拟提供了在未屏蔽极限中有限温度涡旋玻璃化转变的强有力证据。在两种模型中得到的关联长度指数和动力学指数彼此不同，也不同于三维玻璃规模型中的关联长度指数和动力学指数。此外，一个真正的连续脱钉过渡在零温度下观察到的两个模型。对退钉化转变的热圆化的标度分析表明，与最近的研究相反，在涡旋玻璃相中存在一种非Arrhenius型的蠕变运动。
Dynamics of vortices in strongly type-II superconductors with strong disorder is investigated within the frustrated three-dimensional $XY$ model. For two typical models byOlsson [Phys. Rev. Lett. 91, 077002 (2003)] and Kawamura [Phys. Rev. B 68, 220502(R) (2003)], strong evidence for the finite temperature vortex glass transition in the unscreened limit is provided by performing large-scale dynamical simulations. The obtained correlation length exponents and the dynamic exponents in both models are different from each other and from those in the three-dimensional gauge glass model. In addition, a genuine continuous depinning transition is observed at zero temperature for both models. A scaling analysis for the thermal rounding of the depinning transition shows a non-Arrhenius type creep motion in the vortex glass phase, contrarily to the recent studies.