Theory of tunneling spectroscopy in UPd2Al3

Details Theory of tunneling spectroscopy in UPd2Al3 Theory of tunneling spectroscopy in UPd2Al3

2006-12-15

arxiv.org/abs/cond-mat/0612402v1

Physics

Condensed Matter

Superconductivity

6 pages, 8 figures

Scientific paper

10.1103/PhysRevB.75.184502

There is still significant debate about the symmetry of the order parameter in the heavy-fermion superconductor UPd$_{2}$Al$_{3}$, with proposals for cos(k3), cos(2k3), sin(k3),and exp(i\phi) sin(k3). Here we analyze the tunneling spectroscopy of this compound and demonstrate that the experimental results by Jourdan et al are inconsistent with the last two order parameters, which are expected to show zero-bias conductance peaks. We propose a definitive tunneling experiment to distinguish between the first two order parameters.

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