| Issue |
Europhys. Lett.
Volume 34, Number 8, June II 1996
|
|
|---|---|---|
| Page(s) | 593 - 598 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1996-00500-3 | |
| Published online | 01 September 2002 | |
"Giant" Aharonov-Bohm effect in mesoscopic silver rings with bismuth electrodes
1
Institute for Microelectronics Technology, Russian Academy of Sciences
Chernogolovka, Moscow District, 142432, Russia
2
H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue,
Bristol, BS8 1TL, UK
Aharonov-Bohm resistance oscillations of mesoscopic silver rings are found to be
enhanced 
times when contact to the ring is made with bismuth rather than
silver or gold electrodes. An argument based on the idea that a mismatch of
the Fermi surfaces at the interfaces leads to a reduced effective electrode
size is shown to be inadequate, as the resistance oscillations exceed the
maximum theoretical value of Altshuler, Aronov and Spivak (1991) by an order of
magnitude.
PACS: 72.15.-v – Electronic conduction in metals and alloys / 73.23.-b – Mesoscopic systems / 73.40.-c – Electronic transport in interface structures
© EDP Sciences, 1996
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