Theory of tunneling spectroscopy in UPd2Al3

Abstract

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(iϕ) 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.

arXiv comment6 pages, 8 figures

References in corpus (7)

• Midgap edge states and pairing symmetry of quasi-one-dimensional organic superconductors
• Nodal Structure of Unconventional Superconductors Probed by the Angle Resolved Thermal Transport Measurements
• Superconducting Gap Function in Antiferromagnetic Heavy-Fermion UPd_2Al_3 Probed by Angle Resolved Magnetothermal Transport Measurements
• Strong-coupling theory of magnetic-exciton-mediated superconductivity in UPd${}_2$Al${}_3$
• Theory of magnetic excitons in the heavy-fermion superconductor $UP{d}_{2}A{l}_3$
• Gap Symmetry of Superconductivity in UPd2Al3
• A Mechanism of Spin-Triplet Superconductivity in Hubbard Model on Triangular La ttice: Application to UNi_2Al_3

Cited by in corpus (1)

• Analytic Density of States in the Abrikosov-Gorkov Theory