Volume 39, Number 6, September 1997
|Page(s)||651 - 656|
|Section||Condensed matter: electronic, structure, electrical, magnetic and optical properties|
|Published online||01 September 2002|
Resonant Josephson current
Racah Institute of Physics,
Hebrew University, Jerusalem, 91904, Israel
Accepted: 28 July 1997
It is shown that the resonant Josephson current where both electrons of a Cooper pair tunnel resonantly cannot take place with just one intermediate localized state. A true resonance is possible only if two electrons of a Cooper pair tunnel through two different localized states in the junction with energies close to different edges of the superconducting gap. The tunneling amplitude is not described by the Breit-Wigner formula and its value is strongly affected by the singularity of the density of states in superconductors. This amplitude and the critical current are calculated.
PACS: 74.50.+r – Proximity effects, weak links, tunneling phenomena, and Josephson effects / 73.40.Gk – Tunneling
© EDP Sciences, 1997
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