Polarization-dependent electron affinity of LiNbO3 surfaces

Polarization-dependent electron affinity of LiNbO3 surfaces

Ferroelectric Polarization Dependent Interactions at Pd-LiNbO3(0001) Interfaces

A combination of Auger electron spectroscopy and temperature-programed desorption was used to characterize the growth and interaction of Pd films with positively and negatively terminated ferroelectric LiNbO3(0001) surfaces. The growth mode of vapor-deposited Pd layers at 300 K was found to be dependent on the direction of the ferroelectric polarization with layer-by-layer growth occurring on t...

Polarization-dependent water adsorption on the LiNbO3(0001) surface

The effect of ferroelectric poling on the adsorption characteristics of water at lithium niobate surfaces is investigated by ab initio calculations. Thereby we model the adsorption of H2O monomers, small water clusters, and water thin films on the LiNbO3(0001) surface. The adsorption configuration and energy are determined as a function of the surface coverage on both the positive and negative ...

Kinetics of palladium particles on LiNbO3: an origin of the polarization-dependent catalysis

Using ab-initio calculations and kinetic Monte Carlo simulations, we demonstrate that the deposition geometries of palladium are strongly dependent on the polarization direction of the LiNbO3 substrate. Different stoichiometries and atomic structures of the positively and the negatively polarized substrates cause substantially different bonding configurations of palladium and energy barriers fo...

Time-dependent electron phenomena at surfaces.

Femtosecond and subfemtosecond time scales typically rule electron dynamics at metal surfaces. Recent advance in experimental techniques permits now remarkable precision in the description of these processes. In particular, shorter time scales, smaller system sizes, and spin-dependent effects are current targets of interest. In this article, we use state-of-the-art theoretical methods to analyz...