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