D. Maradan
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View article: Robust formation of quantum dots in GaAs/AlGaAs heterostructures for single-electron metrology
Robust formation of quantum dots in GaAs/AlGaAs heterostructures for single-electron metrology Open
The robust and reproducible formation of a quantum dot is key for the development of tunable barrier single-electron pumps as a future quantum current standard. We investigate the fabrication process and perform electrical characterization…
View article: On-and-off chip cooling of a Coulomb blockade thermometer down to 2.8 mK
On-and-off chip cooling of a Coulomb blockade thermometer down to 2.8 mK Open
Cooling nanoelectronic devices below 10 mK is a great challenge since thermal conductivities become very small, thus creating a pronounced sensitivity to heat leaks. Here, we overcome these difficulties by using adiabatic demagnetization o…
View article: Magnetic cooling for microkelvin nanoelectronics on a cryofree platform
Magnetic cooling for microkelvin nanoelectronics on a cryofree platform Open
We present a parallel network of 16 demagnetization refrigerators mounted on a cryofree dilution refrigerator aimed to cool nanoelectronic devices to sub-millikelvin temperatures. To measure the refrigerator temperature, the thermal motion…
View article: Tunnel-Junction Thermometry Down to Millikelvin Temperatures
Tunnel-Junction Thermometry Down to Millikelvin Temperatures Open
We present a simple on-chip electronic thermometer with the potential to operate down to 1 mK. It is based on transport through a single normal-metal - superconductor tunnel junction with rapidly widening leads. The current through the jun…
View article: Magnetic refrigeration for nanoelectronics on a cryogen-free platform
Magnetic refrigeration for nanoelectronics on a cryogen-free platform Open
Nanostructured samples serve as a playground of solid state physics due to their vast diversity of applications. In addition to various fabrication recipes and measurement methods, the temperature at which these experiments are performed p…