Regensburg 2016 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 19: Superconductivity: Poster Session

TT 19.10: Poster

Montag, 7. März 2016, 15:00–18:00, Poster D

Quasiparticle interference in heavy fermion superconductors: role of the slab geometry — •Fabian Lambert¹, Alireza Akbari^3,4, Peter Thalmeier⁵, and Ilya Eremin^1,2 — ¹Institute für Theoretische Physik III, Ruhr-Universität Bochum, D-44801 Bochum, Germany — ²Institute of Physics, Kazan (Volga Region) Federal University, 420008 Kazan, Russian Federation — ³Asia Pacific Center for Theoretical Physics (APCTP) — ⁴Department of Physics, and Max Planck POSTECH Center for Complex Phase Materials, POSTECH, Pohang 790-784, Korea — ⁵Max Planck Institute for the Chemical Physics of Solids, D-01187 Dresden, Germany

We analyze theoretically the quasiparticle interference in the heavy fermion superconductors CeCoIn₅ and UPt₃ as a direct method to investigate the gap symmetry. In contrast to the prior attempts that computed QPI patterns for some effective two-dimensional models or by perfoming calculations for varous k_z cuts and then averaging the final result, we perfom the calculations for the three-dimensional models in the slab geometry and investigate possible effects of the finite sample size, topology, and surface termination. Comparing with the results of prior analysis of the bulk system we can conclude on the importance of the possible surface states for determining the QPI pattern.