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Title: Determining the vortex tilt relative to a superconductor surface

Abstract

Here, it is of interest to determine the exit angle of a vortex from a superconductor surface, since this affects the intervortex interactions and their consequences. Two ways to determine this angle are to image the vortex magnetic fields above the surface, or the vortex core shape at the surface. In this work we evaluate the field h(x,y,z) above a flat superconducting surface x,y and the currents J(x,y) at that surface for a straight vortex tilted relative to the normal to the surface, for both the isotropic and anisotropic cases. In principle, these results can be used to determine the vortex exit tilt angle from analyses of magnetic field imaging or density of states data.

Authors:
 [1];  [2]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  2. Stanford Univ., Stanford, CA (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1411943
Report Number(s):
IS-J-9357
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1800285
Grant/Contract Number:
AC02-07CH11358
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 96; Journal Issue: 17; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Kogan, V. G., and Kirtley, J. R. Determining the vortex tilt relative to a superconductor surface. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.96.174516.
Kogan, V. G., & Kirtley, J. R. Determining the vortex tilt relative to a superconductor surface. United States. doi:10.1103/PhysRevB.96.174516.
Kogan, V. G., and Kirtley, J. R. 2017. "Determining the vortex tilt relative to a superconductor surface". United States. doi:10.1103/PhysRevB.96.174516.
@article{osti_1411943,
title = {Determining the vortex tilt relative to a superconductor surface},
author = {Kogan, V. G. and Kirtley, J. R.},
abstractNote = {Here, it is of interest to determine the exit angle of a vortex from a superconductor surface, since this affects the intervortex interactions and their consequences. Two ways to determine this angle are to image the vortex magnetic fields above the surface, or the vortex core shape at the surface. In this work we evaluate the field h(x,y,z) above a flat superconducting surface x,y and the currents J(x,y) at that surface for a straight vortex tilted relative to the normal to the surface, for both the isotropic and anisotropic cases. In principle, these results can be used to determine the vortex exit tilt angle from analyses of magnetic field imaging or density of states data.},
doi = {10.1103/PhysRevB.96.174516},
journal = {Physical Review B},
number = 17,
volume = 96,
place = {United States},
year = 2017,
month =
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on November 20, 2018
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  • The field dependence of the pinning force has been studied in thin single crystals of the layered superconductor 2{ital H}-NbSe{sub 2} in fields directed perpendicular to the layers. At high fields a peak effect is observed which sets in at about {ital B}{sub co}{approx}0.8{ital B}{sub {ital c}2}. Below this field the pinning force agrees well with the theory of two-dimensional collective pinning. The onset of the peak is triggered by the transition to three-dimensional flux-line lattice (FLL) disorder at the field {ital B}{sub co}. Comparison of the crossover field with the criterion set by the collective-pinning theory reveals that themore » tilt modulus of the FLL in a layered superconductor is considerably reduced. The reduction factor corresponds very well to recent theoretical predictions. These results are of importance for the prediction of depinning and flux-line lattice melting in all kinds of anisotropic superconductors.« less
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