Abstract
We report resonant x-ray scattering studies of charge and orbital order in with and 0.5. Below the ordering temperature, , the charge and orbital order intensities follow the same temperature dependence, including an increase at the antiferromagnetic ordering temperature, . High resolution measurements reveal, however, that long range orbital order is never achieved. Rather, an orbital domain state is formed. Above , the charge order fluctuations are more highly correlated than the orbital fluctuations. We conclude that the charge order drives the orbital order at the transition.
- Received 12 May 1999
DOI:https://doi.org/10.1103/PhysRevLett.83.4872
©1999 American Physical Society