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Thermal Transport in Nanoelectronic Devices Cooled by On-Chip Magnetic Refrigeration

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Article number077001
<mark>Journal publication date</mark>18/08/2023
<mark>Journal</mark>Physical review letters
Issue number7
Number of pages6
Publication StatusPublished
Early online date17/08/23
<mark>Original language</mark>English


On-chip demagnetization refrigeration has recently emerged as a powerful tool for reaching microkelvin electron temperatures in nanoscale structures. The relative importance of cooling on-chip and off-chip components and the thermal subsystem dynamics are yet to be analyzed. We study a Coulomb blockade thermometer with on-chip copper refrigerant both experimentally and numerically, showing that dynamics in this device are captured by a first-principles model. Our work shows how to simulate thermal dynamics in devices down to microkelvin temperatures, and outlines a recipe for a low-investment platform for quantum technologies and fundamental nanoscience in this novel temperature range.