Cooling electrons by magnetic-field tuning of Andreev reflection.
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.
Giazotto
Francesco
F
NEST CNR-INFM and Scuola Normale Superiore, I-56126 Pisa, Italy. giazotto@sns.it
Taddei
Fabio
F
Governale
Michele
M
Castellana
Carlo
C
Fazio
Rosario
R
Beltram
Fabio
F