Funding
EMP is funded through the Horizon2020 programme of the European Commission. 
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
Specific Heat of K0.71Na0.29Fe2As2 at Very Low Temperatures
A. Reifenberger, M. Hempel, P. Vogt, S. Aswartham, M. Abdel-Hafiez, V. Grinenko, S. Wurmehl, S.-L. Drechsler, A. Fleischmann, C. Enss and R. Klingeler
A commercially available calorimeter has been used to investigate the specific heat of a high-quality K0.71Na0.29Fe2As2single crystal.The addenda heat capacity of the calorimeter is determined in the temperature range 0.02K ≤ T ≤ 0.54K. The
data of the K0.71Na0.29Fe2As2 crystal imply the presence of a large T2 contribution to the specific heat which gives evidence of d-wave order parameter symmetry in the superconducting state. To improve the measurements, a novel design for a calorimeter
with a paramagnetic temperature sensor is presented. It promises a temperature resolution of ΔT ≈ 0.1μK and an addenda heat capacity less than 200 pJ/K at T < 100mK.
Journal of Low Temperature Physics 175, 755-763 (2014)
doi: 10.1007/s10909-014-1168-7