Observation of quantum fluctuation in nano Sr2RuO4 p-wave superconductors

Abstract

We observed quantum fluctuations of the superconducting phase in single domain Sr2RuO4 single crystals using a transport measurement. The temperature dependence of the resistivity of submicron Sr 2RuO4 shows that a finite resistivity below the superconducting transition temperature of Tc = 1.69 K. The results may suggest that the finite resistivity is occurred by the flow of vortices due to quantum fluctuations of the superconducting phase in the same way as one-dimensional Josephson junction array systems. © 2008 IOP Publishing Ltd.