No abstract

Abstract. Differential resistance spectra (dV /dI − V characteristics) have been measured for point-contacts between the heavy-fermion superconductor (HFS) CePt 3 Si and a normal metal. Some contacts show a peak at V = 0 that is characteristic of HFS coexisting with a magnetic order such as UPd 2 Al 3 , UNi 2 Al 3 and URu 2 Si 2 . The evolution of the peak occurs well above the antiferromagnetic transition temperature T N ∼ 2.2 K, so that the direct relationship with the magnetic transition is questionable. The half-width of the peak seems to reflect the crystal field splitting or the spin-wave gap as observed for the above-mentioned HFSs, possibly suggesting that some common scattering process induces the zerobias peaks in these materials.