Title
Long-range Coulomb repulsion effect on a charged vortex in high-temperature superconductors with competing **d**-wave and antiferromagnetic orders Long-range Coulomb repulsion effect on a charged vortex in high-temperature superconductors with competing **d**-wave and antiferromagnetic orders
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Lancaster, Pa ,
Subject
Physics
Source (journal)
Physical review : B : solid state. - Lancaster, Pa, 1970 - 1978
Volume/pages
78(2008) :6 , p. 064505,1-064505,5
ISSN
0556-2805
ISI
000259264900084
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Vortex charges in high-temperature superconductor (HTS) are studied by solving the Bogoliubovde Gennes equations based on a model Hamiltonian with antiferromagnetic (AF) and d-wave orders in the presence of the long-range Coulomb repulsion. For a sufficient strength of the AF order, the negative vortex charge is found. A sign change between negative and positive may occur by tuning the long-range Coulomb repulsion strength or the doping parameter. Recent NMR experiments are hopefully understood. We show that the charged vortex can induce a spin-orbit coupling that is important for superconductors with a short coherence length and a large value of the energy gap over the Fermi-level ratio. Fractional flux quanta are possible for HTS.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/876ba9/a35a0baf.pdf
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