Reason for free electrons from the surface of ferroelectrics with a metal lattice structure

Abstract

This work is an analytical description of a phenomenon known as electron emission from ferroelectrics. The production of free electrons from the surface of ferroelectrics with a metal lattice structure will be explained. An analytical field calculation shows that with a given structure the apparent surface charges of the ferroelectrics produce an electric field, which causes an electron emission from the metal lattice because of the tunnel effect. The emission process is described on the basis of the Fowler-Nordheim formula. After the polarization change of the ferroelectrics, free electrons are produced as a result of the Coulomb interaction. In theory this work analyzes the question of producing high density electron currents by means of ferroelectric materials. The calculated values are compared to empirically found data.