A theory for tunneling spectroscopy in a normal-metal–insulator–triplet-superconductor junction is presented. We assume two kinds of nonunitary triplet-superconducting states which are the most promising states for ${\mathrm{Sr}}_2{\mathrm{RuO}}_4.$ The calculated conductance spectra show zero-bias peaks as well as gap structures. The existence of residual components in the spectra reflect the nonunitary properties of superconducting states.

• Received 21 April 1997

DOI:https://doi.org/10.1103/PhysRevB.56.7847