Abstract
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 & 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.
Original language | English |
---|---|
Pages (from-to) | 651-656 |
Number of pages | 6 |
Journal | Europhysics Letters |
Volume | 39 |
Issue number | 6 |
DOIs | |
State | Published - 15 Sep 1997 |