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arXiv 1802.07937cond-mat.supr-con
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二维超导体在手征螺旋磁振荡磁场作用下涡旋态的相变

Phase transition of vortex states in two-dimensional superconductors under a oscillating magnetic field from the chiral helimagnet

Saoto Fukui, Masaru Kato, Yoshihiko Togawa, Osamu Sato

摘要:

本文研究了手征螺旋磁振荡磁场作用下二维超导体中的涡旋态。本文用有限元法求解了二维Ginzburg-Landau方程。我们发现,当来自手征螺旋磁的磁场增加时,在所有周期区域中同时出现涡旋。这种转变不同于均匀磁场下的转变。在振荡磁场和均匀磁场的复合磁场(下涡旋)下,与均匀磁场反平行的涡旋消失。然后,小的均匀磁场容易去除下涡旋。

英文摘要:

We have investigated vortex states in two-dimensional superconductors under a oscillating magnetic field from a chiral helimagnet. We have solved the two-dimensional Ginzburg-Landau equations with finite element method. We have found that when the magnetic field from the chiral helimagnet increases, vortices appear all at once in all periodic regions. This transition is different from that under the uniform magnetic field. Under the composite magnetic field with the oscillating and uniform fields (down-vortices), vortices antiparallel to the uniform magnetic field disappear. Then, the small uniform magnetic field easily remove down-vortices.

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。

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