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- W4316035829 abstract "Scanning tunneling microscopy experiments have revealed a spontaneous rippled-to-buckled transition in heated graphene sheets, in absence of any mechanical load. Several models relying on a simplified picture of the interaction between elastic and internal, electronic, degrees of freedom have been proposed to understand this phenomenon. Nevertheless, these models are not fully consistent with the classical theory of elasticity, since they do not preserve rotational invariance. Herein, we develop and analyze an alternative classical spin-elastic model that preserves rotational invariance while giving a qualitative account of the rippled-to-buckled transition. By integrating over the internal degrees of freedom, an effective free energy for the elastic modes is derived, which only depends on the curvature. Minimization of this free energy gives rise to the emergence of different mechanical phases, whose thermodynamic stability is thoroughly analyzed, both analytically and numerically. All phases are characterized by a spatially homogeneous curvature, which plays the role of the order parameter for the rippled-to-buckled transition, in both the one- and two-dimensional cases. In the latter, our focus is put on the honeycomb lattice, which is representative of actual graphene." @default.
- W4316035829 created "2023-01-14" @default.
- W4316035829 creator A5007973672 @default.
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- W4316035829 date "2023-01-13" @default.
- W4316035829 modified "2023-10-15" @default.
- W4316035829 title "Buckling in a rotationally invariant spin-elastic model" @default.
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- W4316035829 doi "https://doi.org/10.1103/physreve.107.014120" @default.
- W4316035829 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36797953" @default.
- W4316035829 hasPublicationYear "2023" @default.
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