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Two Phases with Different Domain Wall Networks and a Reentrant Phase Transition in Bilayer Graphene under Strain
Irina V Lebedeva1, Andrey M Popov2
1CIC nanoGUNE BRTA, San Sebastián 20018, Spain.
Abstract:
The analytical two-chain Frenkel-Kontorova model is used to describe domain wall networks in bilayer graphene upon biaxial stretching of one of the layers. We show that the commensurate-incommensurate phase transition leading to formation of a regular triangular domain wall network at the relative biaxial elongation of 3.0×10^{-3} is followed by the transition to another incommensurate phase with a striped network at the elongation of 3.7×10^{-3}. The reentrant transition to the phase with a triangular domain wall network is predicted for the elongation ∼10^{-2}.
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