Eur. Phys. J. B 44, 137-143 (2005)
https://doi.org/10.1140/epjb/e2005-00109-4

A theoretical study of tunnelling conductance in ferromagnet/ PrOs₄Sb₁₂ junctions

Department of Physics, Xiamen University, Xiamen 361005, P.R. China

Corresponding author: ^a gysun@xmu.edu.cn

Received: 29 September 2004
Revised: 9 January 2005
Published online: 20 April 2005

Abstract

The tunnelling conductance spectra of ferromagnet/PrOs₄Sb₁₂ junctions are theoretically investigated by using the Blonder-Tinkham-Klapwijk theory. Three pairs of possible candidate for the pairing symmetry of superconducting energy gap of the recently discovered heavy-fermion unconventional superconductor PrOs₄Sb₁₂ are chosen for calculation. We have studied the spin-polarization effect on the conductance spectra, with respect to different strength of ferromagnetism of the ferromagnet and different strength of the interface barrier. Moreover, we have discussed the influence of nodal structures of the superconducting energy gap on the conductance spectra. Different features of the tunnelling conductance spectra were got, which may serve as useful theoretical comparisons for future experiments.