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Journal Article

Surface State Tunneling Signatures in the Two-Component Superconductor UPt3


Thalmeier,  Peter
Peter Thalmeier, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Lambert, F., Akbari, A., Thalmeier, P., & Eremin, I. (2017). Surface State Tunneling Signatures in the Two-Component Superconductor UPt3. Physical Review Letters, 118(8): 087004, pp. 1-5. doi:10.1103/PhysRevLett.118.087004.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002C-E085-6
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 UPt3 whose gap structure is still controversial. Starting from a 3D electronic structure and the three proposed chiral gap models E1(g,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 UPt3 superconductor.