Year: 2008
Type: preprint
Abstract: We find, with the use of first-principles calculations, that a single-atom-thick boron-nitride (BN) sheet exhibits an unusual nonlinear electromechanical effect: it becomes macroscopically polarized when bent out-of-plane. The direction of the induced polarization is in the plane of the film and it depends non-analitically on the corrugation wave vector k. The magnitude of the polarization can reach very high values in spite of being at least quadratic in atomic displacements due to BN sheets being able to tolerate large mechanical strains. The discovered effect can find many applications, in particular, in a new type of efficient and reliable nanogenerators.
Source: arXiv (Cornell University)
Authors: Naumov, Ivan, Bratkovsky, Alexander M., Ranjan, V.
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1794970519