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Field dependence of the vortex core size probed by scanning tunneling microscopy

TitleField dependence of the vortex core size probed by scanning tunneling microscopy
Publication TypeJournal Article
Year of Publication2016
AuthorsFente, A, Herrera, E, Guillamon, I, Suderow, H, Manas-Valero, S, Galbiati, M, Coronado, E, Kogan, VG
JournalPhysical Review B
Volume94
Pagination014517
Date Published07
Type of ArticleArticle
ISBN Number2469-9950
Accession NumberWOS:000381478300004
Keywordsdensity-of-states, equation, ii superconductors, line, model, physics, Spectroscopy, tips
Abstract

0))(-1), differs from xi(H) by a material dependent numerical factor. The new data on the tunneling conductance and vortex lattice of the 2H-NbSe1.8S0.2 show the in-plane isotropic vortices, suggesting that substitutional scattering removes the in-plane anisotropy found in the two-gap superconductor 2H-NbSe2. We fit the tunneling conductance of 2H-NbSe1.8S0.2 to a two gap model and calculate the vortex core size C for each band. We find that C is field independent and has the same value for both bands. We also analyze the two-band superconductor 2H-NbS2 and find the same result. We conclude that, independently of the magnetic field induced variation of the order parameter values in both bands, the spatial variation of the order parameter close to the vortex core is the same for all bands.

DOI10.1103/PhysRevB.94.014517
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Complex States

Alternate JournalPhys. Rev. B