Abstract
A theory of tunneling conductance spectra for a normal metal/insulator/Sr 2RuO 4 junction is presented. We assume several types of air potentials with triplet symmetries that are promising candidates for Sr 2RuO 4. The calculated conductance spectra show either zero bias peaks of gap-like structures depending on the orientations of the junctions. The existence of residual components in the gap reflects a non-unitary property of the superconducting states. Based on the calculation of a temperature dependence, we verify that a measurement temperature below 100 mK is required to determine the pairing symmetry experimentally.
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