Transport properties of proton irradiated HgBa2Ca2Cu3O8+delta superconducting thin film

Excess conductivities of superconducting Hg-1223 thin films irradiated with proton particles at various doses and of unirradiated ones have been studi ed from the data of resistivity versus temperature. The superconductivity f luctuation contributions to the transport properties of the superconducting Hg-1223 thin films are calculated and compared. The logarithmic plots of e xcess conductivity and reduced temperatures (T-T-c)/T-c reveal two crossove r temperatures with three exponents. Except for the unirradiated sample, wh ich shows a distinct cross-over from 2D to 3D conductivity, all the irradia ted samples fit only the 2D Aslamazov-Larkin (AL) equation above the cross- over temperature.