Abstract
Synchrotron x-ray measurements were made between 20-300 K on single crystals of (Formula presented), which has a quasi-one-dimensional chain and ladder structure, in order to investigate possible charge-ordering effects in the CuO(Formula presented) chains as indicated by recent NMR studies. At 50 K a few very weak satellite peaks were observed at (Formula presented) positions corresponding to a fourfold increase in periodicity along the chain axis. These peaks decreased in intensity with increasing temperature, and eventually disappeared close to 300 K. The observations were interpreted in terms of a charge-ordered model involving both dimerization between two next-nearest-neighbor (Formula presented) ions surrounding a (Formula presented) ion on a Zhang-Rice singlet site, and dimerization between nearest-neighbor (Formula presented) ions.
Original language | English |
---|---|
Pages (from-to) | 10750-10754 |
Number of pages | 5 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 57 |
Issue number | 17 |
DOIs | |
State | Published - 1998 |
Externally published | Yes |