Abstract
Transmission-electron-microscopy measurements characterizing the structural features of charge-ordering (CO) phases in and are presented. A rich variety of structural phenomena resulting from CO transition have been observed at low temperatures. The most interesting of all is the presence of a new structural modulation on the plane. This modulation shows some structural properties in sharp contrast with those of the known -orbital-ordering state. We herein interpret this new structural modulation in terms of the small-polaron ordering.
- Received 2 October 1998
DOI:https://doi.org/10.1103/PhysRevLett.82.2386
©1999 American Physical Society