Grüneisen parameter of the G mode of strained monolayer graphene

Yingchun Cheng, Gaoshan Huang, Udo Schwingenschlögl, Zhiyong Zhu

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69 Scopus citations

Abstract

We present a detailed analysis of the effects of uniaxial and biaxial strain on the frequencies of the G mode of monolayer graphene, using first principles calculations. Our results allow us to explain discrepancies in the experimentally determined values of the Grüneisen parameter. The direction and strength of the applied strain, Poisson's ratio of the substrate, and the intrinsic strain in different experimental setups turn out to be important. A reliable determination of the Grüneisen parameter is a prerequisite of strain engineering.
Original languageEnglish (US)
JournalPhysical Review B
Volume83
Issue number11
DOIs
StatePublished - Mar 28 2011

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