| Issue |
Europhys. Lett.
Volume 70, Number 5, June 2005
|
|
|---|---|---|
| Page(s) | 663 - 669 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2005-10028-0 | |
| Published online | 29 April 2005 | |
Distribution of conduction channels in nanoscale contacts: Evolution towards the diffusive limit
1
Laboratorio de Bajas Temperaturas, Departamento de Física de la Materia Condensada C-III, Universidad Autónoma de Madrid - E-28049 Madrid, Spain
2
Departamento de Física Teórica de la Materia Condensada C-V Universidad Autónoma de Madrid - E-28049 Madrid, Spain
3
Instituto Universitario de Ciencia de Materiales “Nicolás Cabrera” Universidad Autónoma de Madrid - E-28049 Madrid, Spain
Received:
25
January
2005
Accepted:
8
April
2005
We present an experimental determination of the conduction channel
distribution in lead nanoscale contacts with total conductances
ranging from 1 to 15 G0, where 
. It is found that
even for contacts having a cross section much smaller than the
mean free path the distribution tends to be remarkably close to
the universal diffusive limit. With the help of theoretical
calculations we show that this behavior can be associated with
the specific band structure of lead which produces a significant
contribution of partially open channels even in the absence of
atomic disorder.
PACS: 73.23.-b – Electronic transport in mesoscopic systems / 73.63.Rt – Nanoscale contacts / 73.40.Jn – Metal-to-metal contacts
© EDP Sciences, 2005
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