Coherent current transport in wide ballistic Josephson junctions
Journal article, 2004

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.

Author

Peter Samuelsson

University of Geneva

Åke Ingerman

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Göran Johansson

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Evgenii V. Bezuglyi

Institute for Low Temperature Physics and Engineering

Vitaly Shumeiko

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Göran Wendin

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

R. Kursten

Universität Hamburg

Andreas Richter

Universität Hamburg

T. Matsuyama

Universität Hamburg

U. Merkt

Universität Hamburg

Physical Review B - Condensed Matter and Materials Physics

1098-0121 (ISSN)

Vol. 70 212505

Subject Categories

Inorganic Chemistry

Other Physics Topics

Information Systemes, Social aspects

Condensed Matter Physics

DOI

10.1103/PhysRevB.70.212505

More information

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