Effects of gap anisotropy upon the electronic structure around a superconducting vortex

Дата и время публикации : 1997-05-28T10:10:36Z

Авторы публикации и институты :
N. Hayashi (Okayama univ.)
M. Ichioka (Okayama univ.)
K. Machida (Okayama univ.)

Ссылка на журнал-издание: Phys. Rev. B 56, 9052 (1997)
Коментарии к cтатье: 11 pages, REVTeX; 20 PostScript figures; An Animated GIFS file for the star-shaped vortex bound states is available at http://mp.okayama-u.ac.jp/~hayashi/vortex.html
Первичная категория: cond-mat.supr-con

Все категории : cond-mat.supr-con

Краткий обзор статьи: An isolated single vortex is considered within the framework of the quasiclassical theory. The local density of states around a vortex is calculated in a clean type II superconductor with an anisotropy. The anisotropy of a superconducting energy gap is crucial for bound states around a vortex. A characteristic structure of the local density of states, observed in the layered hexagonal superconductor 2H-NbSe2 by scanning tunneling microscopy (STM), is well reproduced if one assumes an anisotropic s-wave gap in the hexagonal plane. The local density of states (or the bound states) around the vortex is interpreted in terms of quasiparticle trajectories to facilitate an understanding of the rich electronic structure observed in STM experiments. It is pointed out that further fine structures and extra peaks in the local density of states should be observed by STM.

Category: Physics