Microscopic calculations on the vortex state of type II superconductors

Microscopic calculations on the vortex state of type II superconductors
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II型超导体涡旋态的微观计算

DOI:
10.1007/bf00681621
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发表时间:
1987
影响因子:
2
通讯作者:
U. Klein
U. Klein
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
U. Klein

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首次对六角涡旋晶格的Eilenberger准经典方程进行了无近似数值求解。文中对计算中使用的数值方法进行了详细的描述。特别强调了低κ第二类超导体的热力学,其中在较低临界场Hc1处发生一级转变(第二/1类行为)。计算了区分II/1类和II类行为的相边界,并与渐近理论的预言进行了比较。除了热力学性质外,还详细讨论了有序参数和磁场的微观结构。在Wigner-Seitz胞腔的边界上,磁场显示出一个新的固定点(鞍点)。应该可以通过μSR实验来验证这一预测。
Eilenberger's quasiclassical equations are solved numerically, for the first time without approximations, for a hexagonal vortex lattice. The numerical methods used in this computation are described in detail. Particular emphasis is laid on the thermodynamics of low-κ, type II superconductors, where a first-order transition at the lower critical fieldHc1occurs (type II/1 behavior). The phase boundary separating type II/1 from type II behavior is computed and compared with the predictions of the asymptotic theory. Besides the thermodynamic properties, the microscopic structure of the order parameter and magnetic field is discussed in detail. On the boundary of the Wigner-Seitz cell the magnetic field shows a new stationary point (saddle point). It should be possible to test this prediction by μSR experiments.
Whittaker 向量的空间不可约性
DOI: --
发表时间: 2007
期刊:
影响因子: --
作者:
Ikehata;M and Ohe;T;松本久義
通讯作者: 松本久義