Print Email Facebook Twitter Transport Properties of an Electron-Hole Bilayer in Contact with a Superconductor Hybrid Junction Title Transport Properties of an Electron-Hole Bilayer in Contact with a Superconductor Hybrid Junction Author Bercioux, D (Donostia International Physics Center; Basque Foundation for Science) Klapwijk, T.M. (TU Delft QN/Klapwijk Lab; Kavli institute of nanoscience Delft) Bergeret, F. S. (Donostia International Physics Center; Centro Mixto CSIC-UPV/EHU) Date 2017-08-07 Abstract We investigate the transport properties of a junction consisting of an electron-hole bilayer in contact with normal and superconducting leads. The electron-hole bilayer is considered as a semimetal with two electronic bands. We assume that in the region between the contacts the system hosts an exciton condensate described by a BCS-like model with a gap Γ in the quasiparticle density of states. We first discuss how the subgap electronic transport through the junction is mainly governed by the interplay between two kinds of reflection processes at the interfaces: the standard Andreev reflection at the interface between the superconductor and the exciton condensate, and a coherent crossed reflection at the semimetal-exciton-condensate interface that converts electrons from one layer into the other. We show that the differential conductance of the junction shows a minimum at voltages of the order of Γ/e. Such a minimum can be seen as a direct hallmark of the existence of the gapped excitonic state. To reference this document use: http://resolver.tudelft.nl/uuid:7abb7835-077f-4224-8f0a-5631df5589a6 DOI https://doi.org/10.1103/PhysRevLett.119.067001 ISSN 0031-9007 Source Physical Review Letters, 119 (6) Part of collection Institutional Repository Document type journal article Rights © 2017 D Bercioux, T.M. Klapwijk, F. S. Bergeret Files PDF PhysRevLett.119.067001.pdf 484.68 KB Close viewer /islandora/object/uuid:7abb7835-077f-4224-8f0a-5631df5589a6/datastream/OBJ/view