The Andreev reflection between a normal metal (N) and a heavy-fermion superconductor (HFS) is studied and the boundary conditions for the electron's wave function in the two systems are established in the framework of a two band model for the HFS. Hence we show in a simple and explicit way that the mass enhancement factors in the heavy-fermion (HF) metal do not cause impedance at the N/HFS interface, in accordance with arguments previously presented. We also present an extension of the theory to a two-fluid model for the heavy-fermion, as possibly applicable to, e.g., CeCoIn_5.
@article{arxiv.0803.0288,
title = {Electron transmission in normal/heavy-fermion superconductor junctions},
author = {M. A. N. Araujo and P. D. Sacramento},
journal= {arXiv preprint arXiv:0803.0288},
year = {2008}
}
Comments
6 pages, 2 figures. Slightly expanded version, closer to that published in Phys Rev B