1. Institute of Machine Design and Tribology (IMKT), Leibniz Universität Hannover, Welfengarten 1a, Lower Saxony, Hanover 30167, Germany (Corresponding author), e-mail: pape@imkt.uni-hannover.de, https://orcid.org/0000-0002-2834-1929
2. Physikalisches Institut, Westfälische Wilhelms-Universität Münster, North Rhine-Westphalia, Wilhelm-Klemm-Str. 10, Münster 48149, Germany
3. Institute of Machine Design and Tribology (IMKT), Leibniz Universität Hannover, Welfengarten 1a, Lower Saxony, Hanover 30167, Germany