2000 character limit reached
Phonon renormalization induced by electric field in ferroelectric P(VDF-TrFE) nanofibers (1910.07710v1)
Published 17 Oct 2019 in cond-mat.mtrl-sci and cond-mat.soft
Abstract: We report phonon renormalization induced by an external electric field E in ferroelectric poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] nanofibers through measuring the E-dependent thermal conductivity. Our experimental results are in excellent agreement with the theoretical ones derived from the lattice dynamics. The renormalization is attributed to the anharmonicity that modifies the phonon spectrum when the atoms are pulled away from their equilibrium positions by the electric field. Our finding provides an efficient way to manipulate the thermal conductivity by tuning external fields in ferroelectric materials.