| Issue |
Europhys. Lett.
Volume 76, Number 3, November 2006
|
|
|---|---|---|
| Page(s) | 498 - 504 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2006-10274-6 | |
| Published online | 22 September 2006 | |
Quantum-size effects on Tc in superconducting nanofilms
1
Departement Fysica, Universiteit Antwerpen - Groenenborgerlaan 171 B-2020 Antwerpen, Belgium
2
Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research 141980 Dubna, Russia
Received:
17
August
2006
Accepted:
1
September
2006
An essential property of a high-quality metallic nanofilm is the
quantization of the electron spectrum due to dimensional confinement
in one direction. Quantum confinement has a substantial impact on
the superconducting characteristics and leads to quantum-size
variations of the critical temperature Tc with film
thickness. We demonstrate that the Bogoliubov-de Gennes equations
are able to describe the thickness-dependent Tc in
nanofilms, and our results are in good agreement with recent
experimental data on 
flat terraces grown on silicon
(Science, 306 (2004) 1915 and Nature Phys., 2
(2006) 173). We predict that the quantum-size oscillations of 
will be more pronounced for 
.
PACS: 74.78.-w – Superconducting films and low-dimensional structures / 74.78.Na – Mesoscopic and nanoscale systems / 74.62.-c – Transition temperature variations
© EDP Sciences, 2006
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