title: Point-contact spectroscopy of the heavy-fermion superconductor CePt(3)Si.
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 zero-bias peaks in these materials.
authors.affiliation: Department of Material Science, Faculty of Science, University of Hyogo, Akō-gun 678-1297, Japan.
authors.forename: R
authors.initials: R
authors.lastname: Onuki
authors.forename: A
authors.initials: A
authors.lastname: Sumiyama
authors.forename: Y
authors.initials: Y
authors.lastname: Oda
authors.forename: T
authors.initials: T
authors.lastname: Yasuda
authors.forename: R
authors.initials: R
authors.lastname: Settai
authors.forename: Y
authors.initials: Y
authors.lastname: Onuki