Fast thermometry with a proximity Josephson junction

Abstract

We couple a proximity Josephson junction to a Joule-heated normal metal film and measure its electron temperature under steady state and nonequilibrium conditions. With a timed sequence of heating and temperature probing pulses, we are able to monitor its electron temperature in nonequilibrium with effectively zero back-action from the temperature measurement in the form of additional dissipation or thermal conductance. The experiments demonstrate the possibility of using a fast proximity Josephson junction thermometer for studying thermal transport in mesoscopic systems and for calorimetry.

7 pages, 4 figures

References in corpus (6)

• Single-mode heat conduction by photons
• Fast electron thermometry towards ultra-sensitive calorimetric detection
• Proximity DC squids in the long junction limit
• Influence of Phonon dimensionality on Electron Energy Relaxation
• Observation of disorder-induced weakening of electron-phonon interaction in thin noble metal films
• Observation of large $h/2e$ and $h/4e$ oscillations in a proximity dc superconducting quantum interference device

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