Coherent current transport in wide ballistic Josephson junctions

P. Samuelsson*, Å Ingerman, G. Johansson, E. V. Bezuglyi, V. S. Shumeiko, G. Wendin, R. Kürsten, A. Richter, T. Matsuyama, U. Merkt

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Article number212505
Pages (from-to)1-4
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number21
StatePublished - Dec 2004
Externally publishedYes


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