title: Blockade and counterflow supercurrent in exciton-condensate Josephson junctions.
abstract: We demonstrate that perfect conversion between charged supercurrents in superconductors and neutral supercurrents in electron-hole pair condensates is possible via a new Andreev-like scattering mechanism. As a result, when two superconducting circuits are coupled through a bilayer exciton condensate, the superflow in both layers is drastically modified. Depending on the phase biases the supercurrents can be completely blocked or exhibit perfect drag.
authors.affiliation: NEST-CNR-INFM and Scuola Normale Superiore, I-56126 Pisa, Italy.
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Dolcini
authors.forename: Diego
authors.initials: D
authors.lastname: Rainis
authors.forename: Fabio
authors.initials: F
authors.lastname: Taddei
authors.forename: Marco
authors.initials: M
authors.lastname: Polini
authors.forename: Rosario
authors.initials: R
authors.lastname: Fazio
authors.forename: A H
authors.initials: AH
authors.lastname: Macdonald