The superconducting gap of \QTR{em}{in situ} $Mg{B}_2$ thin films by microwave surface impedance measurements

N. Hakim, C. Kusko, S. Sridhar +4

Precision measurements of the microwave surface resistance $R_s$ of in situ $Mg{B}_2$ films directly reveal an exponential behavior of $R_s$ at low temperature indicating a ful…