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O: Fachverband Oberflächenphysik

O 64: Poster Session V: Electronic structure of surfaces: Spectroscopy, surface states III

O 64.6: Poster

Wednesday, March 3, 2021, 10:30–12:30, P

Strong anisotropy in the ballistic transport regime on Pd(110) — •Markus Leisegang, Robert Schindhelm, Jens Kügel, and Matthias Bode — Experimentelle Physik 2, Physikalisches Institut, Universität Würzburg

Atomic-scale charge transport is not only of significant fundamental interest but also highly relevant for numerous technical applications. However, experimental methods which are capable of detecting charge transport at the relevant single digit nanometer length scales are scarce. Here we report on molecular nanoprobe (MONA) [1] experiments on Pd(110) where we utilize the charge carrier-driven switching of a single cis-2-butene molecule [2] to detect ballistic transport properties over length scales of a few nanometers. Our data demonstrate a striking angular dependence with a dip in charge transport along the [1-10]-oriented atomic rows and a peak in the transverse [001] direction. The narrow angular width of both features and distance-dependent measurements suggest that the nanometer-scale ballistic transport properties of metallic surfaces are significantly influenced by the atomic structure.

[1] M. Leisegang et al. Nano Letters 18, 2165-2171 (2018)

[2] Y. Sainoo et al. Phys. Rev. Lett. 95, 246102 (2005)