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

Nobuhiko Hayashi, Masanori Ichioka, Kazushige Machida

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)9052-9063
Number of pages12
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume56
Issue number14
Publication statusPublished - Oct 1 1997

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Electronic structure
Vortex flow
Scanning tunneling microscopy
Anisotropy
vortices
electronic structure
scanning tunneling microscopy
anisotropy
Superconducting materials
Energy gap
fine structure
Trajectories
trajectories
Experiments

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Effects of gap anisotropy upon the electronic structure around a superconducting vortex. / Hayashi, Nobuhiko; Ichioka, Masanori; Machida, Kazushige.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 56, No. 14, 01.10.1997, p. 9052-9063.

Research output: Contribution to journalArticle

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