Work

Nonequilibrium Josephson and Andreev current through interacting quantum dots

Year: 2007

Type: article

Abstract: We present a theory of transport through interacting quantum dots coupled to normal and superconducting leads in the limit of weak tunnel coupling. A Josephson current between two superconducting leads, carried by first-order tunnel processes, can be established by the nonequilibrium proximity effect. Both the Andreev and the Josephson currents are suppressed for bias voltages below a threshold set by the Coulomb charging energy. A π-transition of the supercurrent can be driven by tuning gate or bias voltages.

Source: New Journal of Physics

DOI: 10.1088/1367-2630/9/8/278

Authors: Marco G Pala, Michele Governale, Jürgen König

Institutions: Centre National de la Recherche Scientifique, Université Joseph Fourier, Micro and Nanotechnology Innovation Centre, Centre de Radiofréquences, Optique et Micro-nanoélectronique des Alpes, Ruhr University Bochum

Language: English

Topic: Quantum and electron transport phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,610

Funder: Massey University