| Issue |
EPL
Volume 79, Number 5, September 2007
|
|
|---|---|---|
| Article Number | 57008 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/79/57008 | |
| Published online | 06 August 2007 | |
Proximity effect and multiple Andreev reflections in few-layer graphene
1
Université Paris-Sud, CNRS, UMR 8502 - F-91405 Orsay Cedex, France
2
Thales Research and Technology - F-91767 Palaiseau Cedex, France
Corresponding author: bouchiat@lps.u-psud.fr
Received:
11
June
2007
Accepted:
17
July
2007
We have investigated electronic transport of few-layer graphene (FLG)
connected to superconducting electrodes. The device is prepared by mechanical exfoliation of graphite. A small mesa of FLG is connected to two
tungsten electrodes, separated by 
, grown by focused ion
beam. Whereas the tungsten electrodes are superconducting below 4 K, the
proximity effect in FLG develops below 1 K, and is characterized by a factor
2 differential resistance drop at low bias. We find multiple Andreev reflection peaks at voltages corresponding to submultiples of 
(with 
the superconducting gap of the electrodes), which
persist up to fields of a few tesla.
PACS: 73.23.-b – Electronic transport in mesoscopic systems
© Europhysics Letters Association, 2007
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.