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
Evidence of d-wave superconductivity in K1−xNaxFe2As2 (x = 0, 0.1) single crystals from low-temperature specific-heat measurements
M. Abdel-Hafiez, V. Grinenko, S. Aswartham et al
From the measurement and analysis of the specific heat of high-quality K1−xNaxFe2As2 single crystals we establish the presence of large T 2 contributions with coefficients αsc ≈ 30 mJ/mol K3 at low T for both x = 0 and x = 0.1. Together with the observed √B behavior of the specific heat in the superconducting state both findings give evidence of d-wave superconductivity on almost all Fermi-surface sheets with an average gap amplitude of
0 in the range of 0.4–0.8 meV. The derived Δ0 and observed Tc agree well with the values calculated within Eliashberg theory, adopting a spin-fluctuation mediated pairing in the intermediate coupling regime.
Phys. Rev. B (rapid comm.) 87, 180507(R) (2013)
doi: 10.1103/PhysRevB.87.180507