Title
Andreev-type states induced by quantum confinementAndreev-type states induced by quantum confinement
Author
Faculty/Department
Faculty of Sciences. Physics
Research group
Condensed Matter Theory
Electron microscopy for materials research (EMAT)
Publication type
article
Publication
Subject
Physics
Source (journal)
Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques
Volume/pages
2(2008):4, p. 611-615
ISSN
1027-4510
ISI
000262864600021
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The properties of a clean superconductor with nanoscale dimensions are governed by quantum confinement of the electrons. This results in a spatially inhomogeneous superconducting condensate and in the formation of new Andreev-type quasiparticle states. These states are mainly located beyond regions where the superconducting condensate is enhanced. A numerical self-consistent solution of the Bogoliubov-de Gennes equations for a cylindrical metallic nanowire shows that these new Andreev-type states decrease the ratio of the energy gap to the critical temperature.
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