Low-Temperature Friction of Suspended Graphene: Negative friction?

Autor:	Wang, Zhao
Rok vydání:	2019
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Materials Science Condensed Matter - Statistical Mechanics
Druh dokumentu:	Working Paper
Popis:	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 contribution to the friction force in the lateral direction. This functions as a particular energy dissipation mechanism at nanoscale. Comment: The replacement is made by changing the text in order to correct some misinterpretation. The results are unchanged
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1910.00804 Zobrazit plný text záznamu View this record from Arxiv