SKM 2023 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 77: Scanning Probe Techniques: Method Development II

O 77.8: Vortrag

Donnerstag, 30. März 2023, 12:15–12:30, REC C 213

Simultaneous Measurement of Quasiparticle Interference and Decay Length Using Parallel Spectroscopy with the Scanning Tunneling Microscope — •Berk Zengin, Danyang Liu, Aleš Cahlík, Kevin Hauser, and Fabian D. Natterer — University of Zurich, Department of Physics, Winterthurerstrasse 190, 8057 Zurich, Switzerland

Developments in signal processing unlock the possibility to perform significantly faster spectroscopic measurements with a Scanning Tunneling Microscope by utilizing the harmonics created by non-linearities in the current-voltage characteristics. Having the capability to perform spectroscopy on the order of few milliseconds to measure the local density states(LDOS), we can afford to additionally vary the tip sample distance during QPI mapping, providing spatially and energy resolved decay length information. Our work shows how LDOS and decay length mapping can yield valuable insight into the electronic structure and dispersion relation of surface electrons.