Discovery of a new topological phase could lead to exciting developments in nanotechnology Cambridge_Uni NatureComms
). This further allows the decomposition of the polarization into the contributions from the displacements of different atoms and in different directions. The polarization is mostly generated by in-plane sliding, with negligible contributions from the out-of-plane displacements, i.e. the rippling of the interlayer separation as one layer slides over the other.
Our findings indicate that the polar properties of layered systems are much richer than previously thought. For untwisted bilayer hBN, the energetically favorable AB and BA stackings have zero in-plane polarization. However, knowledge of how the in-plane polarization changes during the process of vdW sliding may prove useful.
Ferroelectric materials have been fabricated in many different geometries, from 2D thin films and FE/PE superlattices to 1D nanowires
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