Vortex-line fluctuations in model high-temperature superconductors.
Vortex-line fluctuations in model high-temperature superconductors.
复制标题
模型高温超导体中的涡线波动。
DOI：
10.1103/physrevb.47.359
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
S. Teitel
中科院分区：
文献类型：
--
作者：
Ying;S. Teitel
我们进行了Monte Carlo模拟的一致受挫三维[ital XY]模型，作为一个模型的涡旋线波动在一个高[ital T][sub [ital c]]超导体在一个外部磁场。涡线密度为[ital f]= 1/25。我们发现两个尖锐的相变。低[ITAL T]超导相是有序的涡旋线晶格。高[italT]正常相是涡旋线液体，具有许多缠结、切割和环激发。一个中间相被发现，其特征在于作为一个涡旋线液体的解开，近似直线。在这个阶段，系统在平行于磁场的方向上显示出超导特性，但在垂直于磁场的平面上表现出正常行为。对涡结构函数进行了详细的分析。
We carry out Monte Carlo simulations of the uniformly frustrated three-dimensional [ital XY] model, as a model for vortex-line fluctuations in a high-[ital T][sub [ital c]] superconductor in an external magnetic field. A density of vortex lines of [ital f]=1/25 is considered. We find two sharp phase transitions. The low-[ital T] superconducting phase is an ordered vortex-line lattice. The high-[ital T] normal phase is a vortex-line liquid, with much entangling, cutting, and loop excitations. An intermediate phase is found, which is characterized as a vortex-line liquid of disentangled, approximately straight, lines. In this phase, the system displays superconducting properties in the direction parallel to the magnetic field, but normal behavior in planes perpendicular to the field. A detailed analysis of the vortex structure function is carried out.