Electrochemically doped Oxides

Spin and charge in electrochemically doped transition metal oxides

Research is done in the framework of a French-German Network and it is funded by the DFG via KL 1824/2-1. The objective of this research program is the study of transition metal oxides in which the charge carrier density is adjusted and controlled via electrochemistry. This method is based on the extraction and insertion of light alcaline metal ions in the crystal lattice which directly changes the valence of the transition metal. It allows the preparation of extraordinary oxidization states with new physical properties. Lithium based transition metal oxides are also used as state-of-the-art rechargable power sources. Therefore a deep understanding of the structural and electronic properties of these systems is also of high technological interest.

Materials under study: Li_2-xCuO₂, Na_xCuO₂, VOx Nanotubes, Sr₂CuO₂Br₂