Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2010-09-10
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages, 4 figures
Scientific paper
We report resonant X-ray scattering measurements on the orbitally-degenerate triangular metallic antiferromagnet 2H-AgNiO2 to probe the spontaneous transition to a triple-cell superstructure at temperatures below 365 K. We observe a strong resonant enhancement of the supercell reflections through the Ni K-edge. The empirically extracted K-edge shift between the crystallographically-distinct Ni sites of 2.5(3) eV is much larger than the value expected from the shift in final states, and implies a core-level shift of ~1 eV, thus providing direct evidence for the onset of spontaneous honeycomb charge order in the triangular Ni layers. We also provide band-structure calculations that explain quantitatively the observed edge shifts in terms of changes in the Ni electronic energy levels due to charge order and hybridization with the surrounding oxygens.
Beutier G.
Bombardi A.
Coldea Radu
Jansen Malte
Johannes Michelle D.
No associations
LandOfFree
Direct observation of charge order in triangular metallic AgNiO2 by single-crystal resonant X-ray scattering does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Direct observation of charge order in triangular metallic AgNiO2 by single-crystal resonant X-ray scattering, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct observation of charge order in triangular metallic AgNiO2 by single-crystal resonant X-ray scattering will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-672670