Abstract
Using Raman and infrared spectroscopies, spontaneous ferriquadrupolar ordering has been observed in the rare-earth-based system . Ordered quadrupoles in the electron subsystem attend nonequivalent distortions of rare-earth ions in the ordered phase. A mean-field theory explaining the onset of such a type of ordering has been constructed.
- Received 30 January 2018
- Revised 11 July 2018
DOI:https://doi.org/10.1103/PhysRevB.98.064406
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