Direct probe of Mott-Hubbard to charge-transfer insulator transition and electronic structure evolution in transition-metal systems
- Resource Type
- Authors
- Olalde-Velasco, P
- Source
- Olalde-Velasco, P. (2011). Direct probe of Mott-Hubbard to charge-transfer insulator transition and electronic structure evolution in transition-metal systems. Physical Review B-Rapid Communications, 83, 24, 240012(R), June 24, 2011. doi: 10.1103/PhysRevB.83.241102. Lawrence Berkeley National Laboratory: Lawrence Berkeley National Laboratory. Retrieved from: http://www.escholarship.org/uc/item/6mw086k5
- Subject
- Mott-hubbard, Charge-transfer, transition-metal systems, Energy Alignment Through Hybridization (EATH)
Physics
Materials Sciences
Condensed Matter::Strongly Correlated Electrons
Environmental Energy Technologies
- Language
- English
We report the most direct experimental verification of Mott-Hubbard and charge-transfer insulators through x-ray emission spectroscopy in transition-metal (TM) fluorides. The p-d hybridization features in the spectra allow a straightforward energy alignment of the anion-2p and metal-3d valence states, which visually shows the difference between the two types of insulators. Furthermore, in parallel with the theoretical Zaanen-Sawatzky-Allen diagram, a complete experimental systematics of the 3d Coulomb interaction and the 2p-3d charge-transfer energy is reported and could serve as a universal experimental trend for other TM systems including oxides.