  Au and Ag are known to be metallic and none of them have shown independently
superconductivity. Here we show superconductivity in Ag implanted Au thin
films. Ag implanted Au films of different thicknesses have been studied using
four probe resistance versus temperature measurements. We have also measured
the pristine samples (i.e. without any implantation) to compare the transport
properties. The superconducting transition occurs around ~2 K (TC) for Ag
implanted 20 nm Au film (the lowest resistance observed below TC is ~10-6 Ohm).
Change of Tc towards lower temperatures has been observed under the effect of
increasing current and magnetic field which endorses the superconducting state.
Further the V~I measurements were carried out to verify the superconducting
nature. On the other hand, the pristine samples clearly did not exhibit
superconductivity down to 1.6 K. Our results open an avenue for further
exploring this type of novel superconductivity for future applications.
