Thermal transport in nanoelectronic devices cooled by on-chip magnetic refrigeration

Abstract

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.

11 pages, 10 figures

References in corpus (5)

• On-and-off chip cooling of a Coulomb blockade thermometer down to 2.8 mK
• Dry demagnetization cryostat for sub-millikelvin helium experiments: refrigeration and thermometry
• Traceable Coulomb Blockade Thermometry
• Cooling low-dimensional electron systems into the microkelvin regime
• Effect of boundary condition on Kapitza resistance between superfluid ${}^3$He-B and sintered metal

Cited by in corpus (1)

• On-chip quantum confinement refrigeration overcoming electron-phonon heat leaks