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arXiv 2003.10917cond-mat.supr-conhep-th
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非中心对称超导体中具有磁场反转的涡旋

Vortices with magnetic field inversion in noncentrosymmetric superconductors

Julien Garaud, Maxim N. Chernodub, Dmitri E. Kharzeev

摘要:

具有非中心对称晶格的超导材料表现出各种有趣的宇称破缺现象,包括磁电效应、自旋极化电流、螺旋态和不寻常的约瑟夫森效应。我们证明,在一个金斯堡-朗道框架内描述非中心对称超导体与$O$点群对称性,涡旋可以表现出反转的磁场在一定距离的涡核。与传统的超导涡旋形成鲜明对比的是,宇称破缺超导体中的磁场反转导致非单调的涡旋间力,并且因此导致涡旋物质的奇异性质,例如形成涡旋束缚态、涡旋簇以及亚稳涡旋/反涡旋束缚态。

英文摘要:

Superconducting materials with noncentrosymmetric lattices lacking space inversion symmetry exhibit a variety of interesting parity-breaking phenomena, including the magneto-electric effect, spin-polarized currents, helical states, and the unusual Josephson effect. We demonstrate, within a Ginzburg-Landau framework describing noncentrosymmetric superconductors with $O$ point group symmetry, that vortices can exhibit an inversion of the magnetic field at a certain distance from the vortex core. In stark contrast to conventional superconducting vortices, the magnetic-field reversal in the parity-broken superconductor leads to non-monotonic intervortex forces, and, as a consequence, to the exotic properties of the vortex matter such as the formation of vortex bound states, vortex clusters, and the appearance of metastable vortex/anti-vortex bound states.

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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