arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0712.4079cond-mat.supr-concond-mat.mes-hallcond-mat.mtrl-sci
收藏

边界条件对介观三维超导体中涡旋斑图的影响--圆盘和球体

Effect of the boundary condition on the vortex patterns in mesoscopic three-dimensional superconductors - disk and sphere

Mauro M. Doria, Antonio R. de C. Romaguera, F. M. Peeters

摘要:

本文用最小化金-朗道自由能的方法确定了介观三维超导体的涡旋态。我们得到了一个介观超导球的涡旋图,发现涡旋线是自然弯曲的,并且在赤道平面处相互最接近。对于有限高的超导圆盘,在垂直于其主表面的磁场作用下,我们发现我们的方法给出的结果与以前的计算一致。匹配场,磁化和$H_{c3}$,根据其边界属性不同的模型获得。如图所示,地表附近的Ginzburg-Landau参数的变化可以显著增强$H_{c3}$。

英文摘要:

The vortex state of mesoscopic three-dimensional superconductors is determined using a minimization procedure of the Ginzburg-Landau free energy. We obtain the vortex pattern for a mesoscopic superconducting sphere and find that vortex lines are naturally bent and are closest to each other at the equatorial plane. For a superconducting disk with finite height, and under an applied magnetic field perpendicular to its major surface, we find that our method gives results consistent with previous calculations. The matching fields, the magnetization and $H_{c3}$, are obtained for models that differ according to their boundary properties. A change of the Ginzburg-Landau parameters near the surface can substantially enhance $H_{c3}$ as shown here.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑