Thin and Dense Solid-solid Heterojunction Formation Promoted by Crystal Growth in Flux on a Substrate.

In this work, we demonstrate the direct growth of cubic LiLaNbO crystal layer on the LiCoO substrate through the conversion of ultra-thin Nb substrate in molten LiOH flux. The initial thickness of the Nb layer determines that of the crystal layer. SEM and TEM observations reveal that the surface is densely covered with well-defined polyhedral crystals.