Half-flux quanta and vortex-antivortex pairs in two-band superconductors
Half-flux quanta and vortex-antivortex pairs in two-band superconductors
复制标题
双带超导体中的半通量量子和涡旋-反涡旋对
DOI:
10.1209/0295-5075/102/27004
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发表时间:
2013-04
期刊:
影响因子:
1.8
通讯作者:
Zhou, Shi-Ping
中科院分区:
文献类型:
--
作者:
Wen, Lin;Zha, Guo-Qiao;Zhou, Shi-Ping
Vortex states of two-band superconductors are investigated based on the microscopic Ginzburg-Landau model. We show that the nonlocal interband coupling can lead to the breaking of translation symmetry and the axial rotation symmetry of the conventional Abrikosov vortex states, resulting in a novel vortex structure comprising a mixture of triangle and square-like vortex lattices that have no counterparts in the single-band superconductors. Half-quantized vortices and stable vortex-antivortex pairs are found. These results may relate to the experimental observations of anomalous vortex structures in the two-band magnesium diboride superconductor.
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