Coherent current transport in wide ballistic Josephson junctions
arXiv:cond-mat/0311344 · doi:10.1103/PhysRevB.70.212505
Abstract
We present an experimental and theoretical investigation of coherent current transport in wide ballistic superconductor-two dimensional electron gas-superconductor junctions. It is found experimentally that upon increasing the junction length, the subharmonic gap structure in the current-voltage characteristics is shifted to lower voltages, and the excess current at voltages much larger than the superconducting gap decreases. Applying a theory of coherent multiple Andreev reflection, we show that these observations can be explained in terms of transport through Andreev resonances.
4 pages, 4 figures
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- Mesoscopic conductance fluctuations in InAs nanowire-based SNS junctions
- Resonant subgap current transport in Josephson field effect transistor
- Subharmonic Gap Structure in Superconductor/Ferromagnet/Superconductor Junctions
- Influence of spin filtering and spin mixing on the subgap structure of I-V characteristics in superconducting quantum point contact
- Interplay between evanescent scattering modes and finite dispersion in superconducting junctions