Selected Publications
- Photon Transport in a Bose-Hubbard Chain of Superconducting Artificial Atoms
G. P. Fedorov et al., Phys. Rev. Lett. 126, 180503 (2021) - Path-Dependent Supercooling of the
He3 Superfluid A-B Transition
Dmytro Lotnyk et al., Phys. Rev. Lett. 126, 215301 (2021) - Superconductivity in an extreme strange metal
D. H. Nguyen et al., Nat Commun 12, 4341 (2021) - High-Q Silicon Nitride Drum Resonators Strongly Coupled to Gates
Xin Zhou et al., Nano Lett. 21, 5738-5744 (2021) - Measurement of the 229Th isomer energy with a magnetic micro-calorimeter
T. Sikorsky et al., Phys. Rev. Lett. 125 (2020) 142503
SQUID noise thermometers with lithographically defined metal sensing elements
J Beyer, A Kirste, C Aßmann, P KrzysteczkoWe present SQUID noise thermometers for sub-kelvin thermometry that employ lithographically defined metal thin-film resistors as the temperature sensors. The resistors with values of about 1 milliohm are lithographically fabricated using Au, PdAu and superconducting Nb wiring. In order to ensure constant resistance values in the whole temperature range of operation, the resistive structures are designed to avoid superconducting proximity effects. The thin-film resistor circuits can be easily combined with different types of multi-purpose dc SQUID current sensors to adapt noise temperatures, uncertainties and measurement speeds as well as robustness against magnetic fields in different measurement setups.
Eng. Res. Express 6, 015302(2024)
doi: 10.1088/2631-8695/ad248c