Two-band superconducting square with a central defect: role of the deGennes extrapolation length
Two-band superconducting square with a central defect: role of the deGennes extrapolation length
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具有中心缺陷的双能带超导方块：德热内斯外推长度的作用
DOI：
10.1140/epjb/e2020-100418-4
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
J. Barba
中科院分区：
文献类型：
--
作者：
T. N. Jorge;Cristhian Aguirre;A. de Arruda;J. Barba
本文研究了具有中心缺陷的双带超导正方形中deGennes外推长度对涡旋物质的影响。这是通过考虑样品侧面的de Gennes外推长度的不同值来确定的。我们的研究是通过求解二维含时Ginzburg-Landau方程组的两带系统（2B-TDGL）进行的。我们研究了在不同的bon值和不同尺寸的内部正方形缺陷的情况下，超导电子的密度、磁化强度、涡度和临界场随外加磁场的变化。我们显示了一个非常规的涡旋状态，由于排斥（吸引）的短（长）程势之间的旋涡。最后，我们证明了在薄膜的极限下，两带系统的行为与三带系统相似。图形摘要
AbstractWe present the influence of the deGennes extrapolation length on the vortex matter in a two band superconducting square with a central defect. This is determined by considering different values of the de Gennes extrapolation lengthbon the lateral surface of the sample. Our investigation was carried out by solving the two-dimensional time-dependent Ginzburg-Landau equations for a two-band system (2B-TDGL). We studied the density, magnetization, vorticity, and critical fields of the superconducting electrons as functions of the external applied magnetic field for different values ofbon the surfaces of the sample and different sizes of the internal square defect. We show an unconventional vortex state due to the repulsive (attractive) short- (long-) range potential between the vortices. Finally, we show that at the limit of the thin film, a two-band system behaves like a three-band system.Graphical abstract