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Limitations in cooling electrons by normal metal - superconductor tunnel junctions
J. P. Pekola, T. T. Heikkila, A. M. Savin +3
We demonstrate both theoretically and experimentally two limiting factors in cooling electrons using biased tunnel junctions to extract heat from a normal metal into a superconduct…
Tailoring Josephson coupling through superconductivity-induced nonequilibrium
F. Giazotto, T. T. Heikkila, F. Taddei +3
The distinctive quasiparticle distribution existing under nonequilibrium in a superconductor-insulator-normal metal-insulator-superconductor (SINIS) mesoscopic line is proposed as…
Ultra-low dissipation Josephson transistor
F. Giazotto, F. Taddei, T. T. Heikkila +2
A superconductor-normal metal-superconductor (SNS) transistor based on superconducting microcoolers is presented. The proposed 4-terminal device consists of a long SNS Josephson ju…
Coherent transport in Nb/delta-doped-GaAs hybrid microstructures
F. Giazotto, P. Pingue, F. Beltram
Coherent transport in Nb/GaAs superconductor-semiconductor microstructures is presented. The structures fabrication procedure is based on delta-doped layers grown by molecular-beam…