NIS cooler platform: from 300 mK to 100 mK

ORAL

Abstract

Normal-insulator-superconducting (NIS) tunnel junctions allow cooling of the normal metal by electrons tunneling across the insulating barrier. With proper biasing, hot electrons leave the normal metal and cold electrons enter from the superconductor, lowering the electronic temperature. The heat dissipation is determined primarily by the quasiparticle relaxation in the superconducting leads. We explore the effects of magnetic field, electrode geometry, direct quasiparticle traps and other fabrication modifications on cooler effectiveness. The overall aim is to produce a general electronic cooler for efficient, solid state, cooling of small devices from 300 to 100 mK.

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Authors

  • Thomas Aref

    • Low Temperature Laboratory, Aalto University, Finland

  • Juha Muhonen

    • Low Temperature Laboratory, Aalto University, Finland

  • Hung Nguyen

    • Low Temperature Laboratory, Aalto University, Finland

  • Joonas Peltonen

    • Low Temperature Laboratory, Aalto University, Finland

  • Matthias Meschke

    • Low Temperature Laboratory, Aalto University, Finland

  • Jukka Pekola

    • Low Temperature Laboratory, Aalto University, Finland