• Corpus ID: 203626532

Low-Temperature Friction of Suspended Graphene: Negative friction?

  title={Low-Temperature Friction of Suspended Graphene: Negative friction?},
  author={Zhao Wang},
  journal={arXiv: Mesoscale and Nanoscale Physics},
  • Zhao Wang
  • Published 2 October 2019
  • Physics
  • arXiv: Mesoscale and Nanoscale Physics
Using molecular dynamics simulations, we probe a suspended graphene layer by a diamond-like-carbon tip at various temperatures. The force acting on the tip in the sliding direction is measured to be negative at liquid-helium temperature. This negative force is found to be associated with a spontaneous lateral oscillation of the suspended graphene in favor of a low interface potential corrugation. Our hypothesis is that, at low temperature, this oscillation induces an important hidden… 

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