Nonequilibrium Superconductivity, Phonons, and Kapitza Boundaries

The importance of phonons has long been recognized by research­ ers in nonequilibrium superconductivity. Similarly, experimentalists studying phonons at low temperatures have relied heavily on supercon­ ductors as sources and detectors. To a large extent this symbiotic relationship has developed with a general mutual awareness; however, to our knowledge these subjects have never been treated toget...