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Research Article

Tunable Negative Poisson’s Ratio in Van der Waals Superlattice

Figure 2

Poisson’s ratio () as a function of G/-BN superlattices in (a) stacking mode A, (b) stacking mode B, and (c) stacking mode C for fixed in the direction and varying in the - plane. Interlayer binding energy () of G/h-BN superlattices in (d) stacking mode A, (e) stacking mode B, and (f) stacking mode C with . The fitting energy curves below the horizontal coordinate axis represent vdW attraction, and the fitting energy curves above the horizontal coordinate axis represent Pauli repulsion. These dashed lines represent the fitting energy curves for , and the solid lines represent the fitting energy curves at the equilibrium position. The insets show enlarged energy curves.