Year: 2009
Type: article
Abstract: We investigate subgap transport through a single-level quantum dot tunnel coupled to one superconducting and two normal-conducting leads. Despite the tendency of a large charging energy to suppress the equilibrium proximity effect, a finite Andreev current through the dot can be achieved in nonequilibrium situations. We propose two schemes to identify nonlocal Andreev transport. In one of them, the presence of strong Coulomb interaction leads to negative values of the nonlocal conductance as a clear signal of nonlocal Andreev transport.
Source: Physical Review B
Institutions: Ruhr University Bochum, Centre National de la Recherche Scientifique, Université Joseph Fourier, Micro and Nanotechnology Innovation Centre, Institut de Microélectronique, Electromagnétisme et Photonique, Centre de Radiofréquences, Optique et Micro-nanoélectronique des Alpes, University of Duisburg-Essen
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funder: Deutsche Forschungsgemeinschaft
OpenAlex ID: W2059204575