Effects of gap anisotropy upon the electronic structure around a superconducting vortex
- Department of Physics, Okayama University, Okayama 700 (Japan)
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-NbSe{sub 2} by scanning tunneling microscopy (STM), is well reproduced if one assumes an {ital 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. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 632644
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 56, Issue 14; Other Information: PBD: Oct 1997
- Country of Publication:
- United States
- Language:
- English
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