Dresden 2026 – scientific programme
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O: Fachverband Oberflächenphysik
O 93: Electronic structure of surfaces: Spectroscopy, surface states III
O 93.7: Talk
Friday, March 13, 2026, 11:00–11:15, HSZ/0201
calcQPI - a tool to simulate quasiparticle interference — •Peter Wahl1,2, Luke Rhodes1, and Carolina de Almeida Marques1 — 1SUPA, School of Physics and Astronomy, University of St Andrews, United Kingdom — 2Physikalisches Institute, Universität Bonn
Quasiparticle interference imaging (QPI) is a powerful tool to study the low energy electronic structure of quantum materials and one of a few methods that can provide phase-sensitive information about the superconducting order parameter of unconventional superconductors, but the interpretation of QPI often requires complex modelling. This talk introduces calcQPI[1,2] as a new tool for the realistic simulation of QPI measurements. CalcQPI allows for the calculation of QPI from tight-binding models for a wide range of quantum materials, including magnetic materials, topological insulators and unconventional superconductors. I will give an overview of its capabilities and a few examples of how it can be applied to real materials.
[1] P. Wahl, L.C. Rhodes, C.A. Marques, calcQPI: A versatile tool to simulate quasiparticle interference, SciPost Phys. Codebases 61 (2025). [2] P. Wahl, L.C. Rhodes, C.A. Marques, Codebase release 1.0 for calcQPI, SciPost Phys. Codebases 61-r1.0 (2025).
Keywords: Strongly correlated electron materials; Quasiparticle interference imaging; scanning tunneling microscopy and spectroscopy