title: Cooling electrons by magnetic-field tuning of Andreev reflection.
abstract: A solid-state cooling principle based on magnetic-field-driven tunable suppression of Andreev reflection in superconductor/two-dimensional electron gas nanostructures is proposed. This cooling mechanism can lead to very large heat fluxes per channel up to 10;{4} times greater than currently achieved with superconducting tunnel junctions. This efficacy and its availability in a two-dimensional electron system make this method of particular relevance for the implementation of quantum nanostructures operating at cryogenic temperatures.
authors.affiliation: NEST CNR-INFM and Scuola Normale Superiore, I-56126 Pisa, Italy. giazotto@sns.it
authors.forename: Francesco
authors.initials: F
authors.lastname: Giazotto
authors.forename: Fabio
authors.initials: F
authors.lastname: Taddei
authors.forename: Michele
authors.initials: M
authors.lastname: Governale
authors.forename: Carlo
authors.initials: C
authors.lastname: Castellana
authors.forename: Rosario
authors.initials: R
authors.lastname: Fazio
authors.forename: Fabio
authors.initials: F
authors.lastname: Beltram