Nanoelectronic thermometers optimised for sub-10 millikelvin operation
| Autor: | Prance, J. R., Bradley, D. I., George, R. E., Richard Haley, Pashkin, Yu A., Sarsby, M., Penttilä, J., Roschier, L., Gunnarsson, D., Heikkinen, H., Prunnila, M. |
|---|---|
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Lancaster University-Pure |
| DOI: | 10.48550/arxiv.1505.07244 |
| Popis: | We report the cooling of electrons in nanoelectronic Coulomb blockade thermometers below 4 mK. Above 7 mK the devices are in good thermal contact with the environment, well isolated from electrical noise, and not susceptible to self-heating. This is attributed to an optimised design that incorporates cooling fins with a high electron-phonon coupling and on-chip electronic filters, combined with a low-noise electronic measurement setup. Below 7 mK the electron temperature is seen to diverge from the ambient temperature. By immersing a Coulomb Blockade Thermometer in the 3He/4He refrigerant of a dilution refrigerator, we measure a lowest electron temperature of 3.7 mK. Comment: 11 pages, 4 figures. (Fixed fitted saturation T_e on p9) |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|