Pyroelectric vector and related polarization effects
arXiv:cond-mat/0307298
Abstract
The principal fact that the pyroelectric vector $\Pb^0$ typical of polar crystals is invisible in equilibrium has been verified. Nevertheless, the general formula for $\Pb^0$ as a definite bulk quantity associated only with the inversion properties of a given charge distribution in the bulk has been obtained. Its application to ferroelectric perovskites BaTiO, PbTiO, and KNbO is discussed.
4 pages, 1 figure, 1 table, RevTeX4. Submitted to Physical Review Letters