Negative Friction Coefficients in Superlubric Graphite-Hexagonal Boron Nitride Heterojunctions

Abstract

Negative friction coefficients, where friction is reduced upon increasing normal load, are predicted for superlubric graphite-hexagonal boron nitride heterojunctions. The origin of this counterintuitive behavior lies in the load-induced suppression of the moiré superstructure out-of-plane distortions leading to a less dissipative interfacial dynamics. Thermally induced enhancement of the out-of-plane fluctuations leads to an unusual increase of friction with temperature. The highlighted frictional mechanism is of a general nature and is expected to appear in many layered material heterojunctions.

34 pages, 16 figures, (file includes Supplemental Material)

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Cited by in corpus (14)

• Mechanical and Tribological Properties of Layered Materials Under High Pressure: Assessing the Importance of Many-Body Dispersion Effects
• Parity-Dependent Moiré Superlattices in Graphene/h-BN Heterostructures: A Route to Mechanomutable Metamaterials
• Twist-Dependent Anisotropic Thermal Conductivity in Homogeneous MoS${}_2$ Stacks
• Assessment on Thermal Transport Properties of Group-III Nitrides: A Classical Molecular Dynamics Study with Transferable Tersoff Type Inter-atomic Potentials
• Moiré-Driven Interfacial Thermal Transport in Twisted Transition Metal Dichalcogenides
• Kinetic Friction of Structurally Superlubric 2D Material Interfaces
• Solid lubrication by wet-transferred solution-processed graphene flakes: dissipation mechanisms and superlubricity in mesoscale contacts
• Anisotropic Interlayer Force Field for Group-VI Transition Metal Dichalcogenides
• Atomistic mechanism of friction force independence on the normal load and other friction laws for dynamic structural superlubricity
• Effective stick-slip parameter for structurally lubric 2D interface friction
• Friction and mobility of carbon nanoparticles on a graphene sheet
• Dramatic effect of a transverse electric field on frictional properties of graphene
• Sliding Over Graphene Grain Boundaries: A Step Towards Macroscale Superlubricity
• Thermodynamic model of twisted bilayer graphene: Configuration entropy matters