Osman, J.; Tilley, D. R.; Teh, R.; Ishibashi, Y.; … - In: The European Physical Journal B - Condensed Matter and … 52 (2006) 1, pp. 143-150
In the presence of a surface the Landau-Devonshire equations of ferroelectricity must be extended to include a boundary condition. For a ferroelectric with a second-order transition in the case when the polarization p(z) increases at the surface, it is well known that a surface state occurs in a...