Quantum Manifestations of Graphene Edge Stress and Edge Instability: A First-Principles Study

Details Quantum Manifestations of Graphene Edge Stress and Edge Instability: A First-Principles Study Quantum Manifestations of Graphene Edge Stress and Edge Instability: A First-Principles Study

2010-02-24

arxiv.org/abs/1002.4483v1

Phys. Rev. Lett. 102, 166404, 2009

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5figures

Scientific paper

We have performed first-principles calculations of graphene edge stresses, which display two interesting quantum manifestations absent from the classical interpretation: the armchair edge stress oscillates with a nanoribbon width, and the zigzag edge stress is noticeably reduced by spin polarization. Such quantum stress effects in turn manifest in mechanical edge twisting and warping instability, showing features not captured by empirical potentials or continuum theory. Edge adsorption of H and Stone-Wales reconstruction are shown to provide alternative mechanisms in relieving the edge compression and hence to stabilize the planar edge structure.

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