title: Surface State Tunneling Signatures in the Two-Component Superconductor UPt_{3}.
abstract: Quasiparticle interference (QPI) imaging of Bogoliubov excitations in quasi-two-dimensional unconventional superconductors has become a powerful technique for measuring the superconducting gap and its symmetry. Here, we present the extension of this method to three-dimensional superconductors and analyze the expected QPI spectrum for the two-component heavy-fermion superconductor UPt_{3} whose gap structure is still controversial. Starting from a 3D electronic structure and the three proposed chiral gap models E_{1g,u} or E_{2u}, we perform a slab calculation that simultaneously gives extended bulk states and topologically protected in-gap dispersionless surface states. We show that the number of Weyl arcs and their hybridization with the line node provides a fingerprint that may finally determine the true nodal structure of the UPt_{3} superconductor.
authors.affiliation: Institut für Theoretische Physik III, Ruhr-Universität Bochum, 44801 Bochum, Germany.
authors.forename: Fabian
authors.initials: F
authors.lastname: Lambert
authors.affiliation: Asia Pacific Center for Theoretical Physics, Pohang, Gyeongbuk 790-784, Korea and Department of Physics, and Max Planck POSTECH Center for Complex Phase Materials, POSTECH, Pohang 790-784, Korea.
authors.forename: Alireza
authors.initials: A
authors.lastname: Akbari
authors.affiliation: Max Planck Institute for Chemical Physics of Solids, D-01187 Dresden, Germany.
authors.forename: Peter
authors.initials: P
authors.lastname: Thalmeier
authors.affiliation: Institut für Theoretische Physik III, Ruhr-Universität Bochum, 44801 Bochum, Germany.
authors.forename: Ilya
authors.initials: I
authors.lastname: Eremin