Journal
NATURE COMMUNICATIONS
Volume 7, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms10563
Keywords
-
Categories
Funding
- German Science Foundation [200021L 141325, GE 1647/3-1]
- Deutsche Forschungsgemeinschaft [SFB 1143]
- Swiss National Science Foundation [PZ00P2 154867]
- Swiss National Science Foundation through the Sinergia network Mott Physics Beyond the Heisenberg Model (MPBH)
- Emmy-Noether programme of the German Research Foundation [GE1647/2-1]
Ask authors/readers for more resources
Strongly correlated insulators are broadly divided into two classes: Mott-Hubbard insulators, where the insulating gap is driven by the Coulomb repulsion U on the transition-metal cation, and charge-transfer insulators, where the gap is driven by the charge-transfer energy Delta between the cation and the ligand anions. The relative magnitudes of U and Delta determine which class a material belongs to, and subsequently the nature of its low-energy excitations. These energy scales are typically understood through the local chemistry of the active ions. Here we show that the situation is more complex in the low-dimensional charge-transfer insulator Li2CuO2, where Delta has a large non-electronic component. Combining resonant inelastic X-ray scattering with detailed modelling, we determine how the elementary lattice, charge, spin and orbital excitations are entangled in this material. This results in a large lattice-driven renormalization of Delta, which significantly reshapes the fundamental electronic properties of Li2CuO2.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available