Vortical patterns in bulk superconducting systems with mixed pairing orders

Vortical patterns in bulk superconducting systems with mixed pairing orders
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具有混合配对顺序的体超导系统中的涡旋模式

DOI:
10.1140/epjb/s10051-021-00104-z
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发表时间:
2021-05
期刊:
Eur. Phys. J. B
影响因子:
--
通讯作者:
Zha Guo-Qiao
Zha Guo-Qiao
中科院分区:
其他
文献类型:
--
作者:
Chai Rui-Feng;Zha Guo-Qiao

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基于一个包含电子间就地排斥相互作用的模型哈密顿量,通过数值求解Bogoliubov-de Gennes方程,研究了体超导系统中混合自旋三重态(主p波)和自旋单重态(副p波和d波)对对称性的空间组态.主要讨论了塞曼场和次近邻跃迁对序参量调制的影响。除了量子化的点状核涡旋态外,未封闭的涡旋链和封闭的Skyrmion模在本样品中仍能保持稳定。此外,在适当的外加通量下,可以得到非均匀的涡格和类椭圆涡。给出了相应的零能局域态密度和显示skyrmionic织构的相对相位差
Based on a model Hamiltonian including the on-site repulsive interaction among the electrons, we investigate the spatial configurations of mixed spin-triplet (dominantp-wave) and spin-singlet (coexisteds-wave andd-wave) pairing symmetries in bulk superconducting systems by numerically solving the Bogoliubov–de Gennes equations. The influences of the Zeeman field and the next-nearest-neighbor hopping on the order-parameter modulations are mainly discussed. Besides the quantized vortex states with point-like cores, the unclosed vortex chains and enclosed skyrmionic modes can remain stable in the present bulk sample. Furthermore, nonuniform patterns of the vortex lattice and the elliptical-like vortices can be obtained at appropriate applied flux. The corresponding zero-energy local density of states as well as the relative phase differences useful to display the skyrmionic texture are providedGraphic abstract
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