Star-shaped local density of states around vortices in a type-II superconductor

Nobuhiko Hayashi, Masanori Ichioka, Kazushige Machida

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

The electronic structure of vortices in a type II superconductor is analyzed within the quasiclassical Eilenberger framework. The possible origin of a sixfold “star” shape of the local density of states, observed by scanning tunneling microscope (STM) experiments on NbSe2, is examined in the light of the three effects: the anisotropic pairing, the vortex lattice, and the anisotropic density of states at the Fermi surface. Outstanding features of split parallel rays of this star are well explained in terms of an anisotropic s-wave pairing. This reveals not only a rich internal electronic structure associated with a vortex core, but also unique ability of the STM spectroscopy.

Original languageEnglish
Pages (from-to)4074-4077
Number of pages4
JournalPhysical Review Letters
Volume77
Issue number19
DOIs
Publication statusPublished - Nov 4 1996

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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