Meissner-London currents in superconductors with rectangular cross section.
Meissner-London currents in superconductors with rectangular cross section.
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DOI：
10.1103/physrevlett.85.4164
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发表时间：
2000-08
影响因子：
8.6
通讯作者：
E. Brandt;G. Mikitik
中科院分区：
文献类型：
--
作者：
E. Brandt;G. Mikitik
给出了在垂直磁场和/或输运电流作用下矩形截面超导带材在迈斯纳态下的磁矩和屏蔽电流的精确解析解。有限伦敦穿透的扩展是通过一种优雅的数值方法实现的，这种方法也适用于圆盘。试件拐角处的表面电流发散为L(-1/3)，其中L为距拐角的距离。这种增强降低了涡旋穿透的势垒，并应增加d波超导体中的非线性迈斯纳效应。
Exact analytic solutions are presented for the magnetic moment and screening currents in the Meissner state of superconductor strips with rectangular cross section in a perpendicular magnetic field and/or with transport current. The extension to finite London penetration is achieved by an elegant numerical method which works also for disks. The surface current in the specimen corners diverges as l(-1/3) where l is the distance from the corner. This enhancement reduces the barrier for vortex penetration and should increase the nonlinear Meissner effect in d-wave superconductors.