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Guillamon, I., Suderow, H., Vieira, S., Cario, L., Diener, P. & Rodiere, P. (2008) Superconducting Density of States and Vortex Cores of 2H-NbS2. Phys. Rev. Lett. 101 166407.
Added by: Laurent Cournède (2016-03-10 21:58:41) |
| Type de référence: Article DOI: 10.1103/PhysRevLett.101.166407 Numéro d'identification (ISBN etc.): 0031-9007 Clé BibTeX: Guillamon2008 Voir tous les détails bibliographiques  |
Catégories: PMN Mots-clés: crystal, dependent superconductivity, flux lattice, ii superconductor, line, microscopy, scanning tunneling spectroscopy, stm, wave Créateurs: Cario, Diener, Guillamon, Rodiere, Suderow, Vieira Collection: Phys. Rev. Lett. |
Consultations : 5/898
Indice de consultation : 5% Indice de popularité : 1.25% |
| Résumé |
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Scanning tunneling microscopy and spectroscopy measurements in the superconducting dichalcogenide 2H-NbS2 show a peculiar superconducting density of states with two well-defined features at 0.97 and 0.53 meV, located, respectively, above and below the value for the superconducting gap expected from the single band s-wave BCS model (Delta=1.76k(B)T(c)=0.9 meV). Both features have a continuous temperature evolution and disappear at T-c=5.7 K. Moreover, we observe the hexagonal vortex lattice with radially symmetric vortices and a well-developed localized state at the vortex cores. The sixfold star shape characteristic of the vortex lattice of the compound 2H-NbSe2 is, together with the charge density wave order, absent in 2H-NbS2.
Added by: Laurent Cournède |