Thermal control of graphene morphology: A signature of its intrinsic surface tension

R. Ramírez and C. P. Herrero
Phys. Rev. B 97, 235426 – Published 18 June 2018

Abstract

The surface tension σ of free-standing graphene is studied by path-integral simulations as a function of the temperature and the in-plane stress. Even if the applied stress vanishes, the membrane displays a finite surface tension σ due to the coupling between the bending oscillations and the real area of the membrane. Zero-point effects for σ are significant below 100 K. Thermal cooling drives the membrane from a planar to a wrinkled morphology. Upon heating the change is reversible and shows hysteresis, in agreement with recent experiments performed on supported graphene.

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  • Received 16 March 2018
  • Revised 27 April 2018

DOI:https://doi.org/10.1103/PhysRevB.97.235426

©2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

R. Ramírez* and C. P. Herrero

  • Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), Campus de Cantoblanco, 28049 Madrid, Spain

  • *ramirez@icmm.csic.es

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Issue

Vol. 97, Iss. 23 — 15 June 2018

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