Velocity Dependence of Moiré Friction

Yiming Song, Xiang Gao, Antoine Hinaut, Sebastian Scherb, Shuyu Huang, Thilo Glatzel, Oded Hod, Michael Urbakh, Ernst Meyer

Research output: Contribution to journalArticlepeer-review


Friction force microscopy experiments on moiré superstructures of graphene-coated platinum surfaces demonstrate that in addition to atomic stick-slip dynamics, a new dominant energy dissipation route emerges. The underlying mechanism, revealed by atomistic molecular dynamics simulations, is related to moiré ridge elastic deformations and subsequent relaxation due to the action of the pushing tip. The measured frictional velocity dependence displays two distinct regimes: (i) at low velocities, the friction force is small and nearly constant; and (ii) above some threshold, friction increases logarithmically with velocity. The threshold velocity, separating the two frictional regimes, decreases with increasing normal load and moiré superstructure period. Based on the measurements and simulation results, a phenomenological model is derived, allowing us to calculate friction under a wide range of room temperature experimental conditions (sliding velocities of 1-104nm/s and a broad range of normal loads) and providing excellent agreement with experimental observations.

Original languageEnglish
Pages (from-to)9529-9536
Number of pages8
JournalNano Letters
Issue number23
StatePublished - 14 Dec 2022


  • 2D materials
  • Friction
  • Graphene/Metal interfaces
  • Moiré superstructure
  • Superlubricity
  • Velocity dependence

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Condensed Matter Physics
  • Mechanical Engineering
  • Bioengineering
  • General Materials Science


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