Transport properties of ZrN superconducting films

Superconductivity in nitrides presents intriguing aspects related to the ro le of optical phonons. In the present paper we report on high-quality super conducting zirconium nitride film preparation and characterization (includi ng Raman scattering) as well as on both de and microwave frequency transpor t properties, The high-temperature dc resistivity shows no evidence of satu ration effects, possibly due to the low electron-phonon coupling. Surface i mpedance data can be well fitted by the standard BCS expressions. The data provide further evidence of the ''conventional'' nature of superconductivit y in these compounds.