Volume 56, Number 6, December 2001
|Page(s)||856 - 862|
|Section||Condensed matter: electronic structure, electrical magnetic and optical properties|
|Published online||01 December 2003|
Phenomenological two-gap model for the specific heat of
Département de Physique de la Matière Condensée Université de
Genève, CH-1211 Genève 4, Switzerland
2 Lawrence Berkeley National Laboratory and Department of Chemistry University of California, Berkeley, CA 94720, USA
3 Materials Science Division, Argonne National Laboratory Argonne, IL 60439, USA
Accepted: 5 October 2001
We show that the specific heat of the superconductor in zero field, for which significant non-BCS features have been reported, can be fitted, essentially within experimental error, over the entire range of temperature to by a phenomenological two-gap model. The resulting gap parameters agree with previous determinations from band structure calculations, and from various spectroscopic experiments. The determination from specific heat, a bulk property, shows that the presence of two superconducting gaps in is a volume effect.
PACS: 74.25.Bt – Thermodynamic properties / 74.20.De – Phenomenological theories (two-fluid, Ginzburg-Landau, etc.) / 74.60.-w – Type-II superconductivity
© EDP Sciences, 2001
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.