Phonon-trapping enhanced energy resolution in superconducting single photon detectors

no code implementations • 11 Mar 2021 • Pieter J. de Visser, Steven A. H. de Rooij, Vignesh Murugesan, David J. Thoen, Jochem J. A. Baselmans

The improvement is equivalent to a factor $8\pm2$ stronger phonon trapping on the membrane, which is consistent with a geometrical phonon propagation model for these hot phonons.

Instrumentation and Methods for Astrophysics Superconductivity Instrumentation and Detectors

Strong Reduction of Quasiparticle Fluctuations in a Superconductor due to Decoupling of the Quasiparticle Number and Lifetime

no code implementations • 8 Mar 2021 • Steven A. H. de Rooij, Jochem J. A. Baselmans, Vignesh Murugesan, David J. Thoen, Pieter J. de Visser

When lowering the temperature, the recombination time saturates and the fluctuation level reduces a factor $\sim$100.

Superconductivity Mesoscale and Nanoscale Physics

Direct evidence for Cooper pairing without a spectral gap in a disordered superconductor above $T_{C}$

no code implementations • 21 Jan 2021 • Koen M. Bastiaans, Damianos Chatzopoulos, Jian-Feng Ge, Doohee Cho, Willem O. Tromp, Jan M. van Ruitenbeek, Mark H. Fischer, Pieter J. de Visser, David J. Thoen, Eduard F. C. Driessen, Teunis M. Klapwijk, Milan P. Allan

The idea that preformed Cooper pairs could exist in a superconductor above its zero-resistance state has been explored for unconventional, interface, and disordered superconductors, yet direct experimental evidence is lacking.

Superconductivity Mesoscale and Nanoscale Physics Strongly Correlated Electrons