Making use of the bogoliubov-de Gennes equation, we study quasi-particle spectrum and the vortex core structure of a single vorte in quasi 2D s-wave super-conductors for small PF xi o, where PF is the Fermi momentum and xi 0 is the coherence length. During our numerical calculation the electron number is conserved for each PF xi o. We find that the number of bound states decreases rapidly for decreasing PF xi p. Also we find that the core structure, the current density distribution and the local density of states strongly depend on the value of PF xi 0 due to the number and the peak positions of bound states.
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机译：利用bogoliubov-de Gennes方程，我们研究了在小PF xi o的准二维s波超导体中准涡旋的准粒子谱和涡旋核心结构，其中PF为费米动量，xi 0为相干长度。在我们的数值计算中，每个PF xi o的电子数均保持不变。我们发现，随着PF xi p的减小，结合态的数量迅速减少。我们还发现，由于键合态的数量和峰值位置，芯的结构，电流密度分布和态的局部密度在很大程度上取决于PF xi 0的值。
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