Three-component artificial superlattices of ferroelectric and nonferroelectric titanates showed predicted asymmetrical ε'(E), reflecting the broken inversion symmetry of the superlattices. Their local bias fields and barrier heights are somewhat heterogeneous, presumably due to material disorder at the interfaces between layers with different constituents. The dipoles consist of several unit cells, but do not grow at low T, raising the question of how the superlattice determines their size.
|Original language||English (US)|
|Journal||Physical review letters|
|State||Published - Jan 24 2003|
ASJC Scopus subject areas
- Physics and Astronomy(all)