Matching effect in a superconducting MoGe antidot array*

MoGe antidot arrays - films containing periodic arrays of nanoscale holes with $\sim $100 nm spacing have been fabricated using anodized aluminum oxide as substrates. Pronounced matching effect (magnetoresistance oscillations) was observed at temperatures near the zero-field critical temperature. By comparing the magnetic field dependences of the resistance and critical temperature in various magnetic field directions, we find that the matching effect in our MoGe antidot arrays originates from hole-induced suppression of the critical temperature.