Tunneling limit of heavy-fermion point contacts
Paper i proceeding, 2011

We present results for a multichannel tunneling model that describes point-contact spectra between a metallic tip and a superconducting heavy-fermion system. We calculate tunneling spectra both in the normal and superconducting state. In point-contact and scanning tunneling spectroscopy many heavy-fermion materials, like CeCoIn5, exhibit an asymmetric differential conductance, dI/dV, combined with a strongly suppressed Andreev reflection signal in the superconducting state. For Andreev reflection to occur a junction has to be in the highly transparent limit. Here we focus on the opposite limit, namely that of low transparency leading to BCS-like dI/dV curves. We discuss the consequences of a multichannel tunneling model for CeCoIn5 assuming itinerant electron bands and localized f electrons.

Författare

Mikael Fogelström

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

M. J. Graf

Journal of Physics: Conference Series

1742-6588 (ISSN)

Vol. 273

Ämneskategorier

Fysik

DOI

10.1088/1742-6596/273/1/012073

Mer information

Skapat

2017-10-08