SKM 2023 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 12: Poster I

MM 12.20: Poster

Monday, March 27, 2023, 18:15–20:00, P2/OG1+2

Non-contact friction on various material systems — •Kim Lambert¹, Niklas Weber¹, Matthias Krüger², and Cynthia Vokert¹ — ¹Institut für Materialphysik, Friedrich-Hund-Platz 1, 37077 Göttingen — ²Institut für Theoretische Physik, Friedrich-Hund-Platz 1, 37077 Göttingen

To gain a deeper understanding of the origins of frictional losses and of how these connect to internal damping in the material, we investigate non-contact friction in various material systems, including graphene flakes and spinodal decomposed systems using AFM-based methods. A main goal of this work is to understand the degrees of freedom that contribute to energy dissipation and to identify the mechanisms contributing to non-contact friction.

For this purpose, we perform friction measurements on these systems under UHV and ambient conditions as well as with different dynamic AFM-based methods. Furthermore, we conduct experiments in contact mode to understand how the damping measured in non-contact is correlated with the energy dissipation measured in contact mode. These insights will be compared to the results of previous studies on [LaMnO3]m/[SrMnO3]n superlattices [1] as well as to theoretical studies on frictional damping via a theory of viscoelasticity [2].

[1] N. A. Weber et.al., arXiv:2210.09677 [2] M. Lee et.al., arXiv:2205.01151