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

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-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}

Authors:
; ;  [1]
  1. Department of Physics, Okayama University, Okayama 700 (Japan)
Publication Date:
OSTI Identifier:
632644
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
Journal Volume: 56; Journal Issue: 14; Other Information: PBD: Oct 1997
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 66 PHYSICS; NIOBIUM SELENIDES; VORTICES; ENERGY GAP; ENERGY-LEVEL DENSITY; ELECTRONIC STRUCTURE; SUPERCONDUCTIVITY; ANISOTROPY; VORTEX FLOW; TYPE-II SUPERCONDUCTORS; MAGNETIC FLUX

Citation Formats

Hayashi, N, Ichioka, M, and Machida, K. Effects of gap anisotropy upon the electronic structure around a superconducting vortex. United States: N. p., 1997. Web. doi:10.1103/PhysRevB.56.9052.
Hayashi, N, Ichioka, M, & Machida, K. Effects of gap anisotropy upon the electronic structure around a superconducting vortex. United States. https://doi.org/10.1103/PhysRevB.56.9052
Hayashi, N, Ichioka, M, and Machida, K. 1997. "Effects of gap anisotropy upon the electronic structure around a superconducting vortex". United States. https://doi.org/10.1103/PhysRevB.56.9052.
@article{osti_632644,
title = {Effects of gap anisotropy upon the electronic structure around a superconducting vortex},
author = {Hayashi, N and Ichioka, M and Machida, K},
abstractNote = {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}},
doi = {10.1103/PhysRevB.56.9052},
url = {https://www.osti.gov/biblio/632644}, journal = {Physical Review, B: Condensed Matter},
number = 14,
volume = 56,
place = {United States},
year = {Wed Oct 01 00:00:00 EDT 1997},
month = {Wed Oct 01 00:00:00 EDT 1997}
}