Research / 2021 / Article / Fig 4

Research Article

Tunable Negative Poisson’s Ratio in Van der Waals Superlattice

Figure 4

The charge density with the isosurface of 0.103 Å−3 and the electron localization function (ELF) with the Miller indices of (1 1 0) of -BN superlattices in (a) stacking mode A, (b) stacking mode B, and (c) stacking mode C. The red dotted arrows and circles indicate the overlap of the orbits, while the black dotted arrows and circles show that the overlap of the orbitals does not actually exist.