Charge transfer in Nb1-xVxSe2 materials: Synchrotron radiation spectroscopy study.

The electronic structure of the single-crystalline solid solutions Nb 1-x V x Se 2 has been studied using soft X-ray photoelectron, resonant photoelectron, and absorption spectroscopy. A charge transfer between VSe 2 and NbSe 2 sublattices was observed. This charge transfer makes the octahedral coordination of the Nb atoms by Se atoms preferable as compared to the trigonal-prismatic coordination in undoped NbSe 2. • Nb 0.9 V 0.1 Se 2 and Nb 0.4 V 0.6 Se 2 single crystals were studied using synchrotron radiation spectroscopy. • The NbSe 2 -and VSe 2 -based structural fragments are being formed within both single crystals. • The charge transfer occurs from NbSe 2 to VSe 2. • The observed charge transfer may be responsible for the change of the coordination of the Nb atoms by the Se ones. [ABSTRACT FROM AUTHOR]