Experimental investigation of the phonon density of states in superconducting thin films, nanowires and nanoparticles KU Leuven
Superconductivity is one of the most intriguing phenomena in solid state physics. It is characterized by the condensation of electrons into Cooper pairs, i.e. below a particular critical temperature there is an effective attractive interaction between electrons, and in bulk materials this manifests itself in (i) the disappearance of electrical resistance and (ii) the expulsion of an external magnetic field. This attractive interaction ...