Rattling Phonon Modes in Quadruple Perovskites

Abstract

Rattling phonon modes are known to be origin of various anomalous physical properties such as superconductivity, suppression of thermal conductivity, enhancement of specific heat etc. By means of DFT+$U$ calculations we directly show presence of the rattling mode in the quadruple perovskites CuCu${}_3$V${}_4$O${}_{12}$ and CuCu${}_3$Fe${}_2$Re${}_2$O${}_{12}$ and argue that this can develop in others as well. It is demonstrated that Cu ions at $A$ sites vibrate in the center of the icosahedral oxygen O${}_{12}$ cages and the corresponding potential has a complicated form with many local minima.

arXiv comment4 pages

References in corpus (9)

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Cited by in corpus (4)

• Ab initio study on magnetism suppression, anharmonicity, rattling mode and superconductivity in Sc${}_{6}M$Te${}_2$ ($M$=Fe, Co, Ni)
• Highly correlated electronic state in a ferrimagnetic quadruple perovskite CuCu${}_3$Fe${}_2$Re${}_2$O${}_{12}$
• Exchange interaction in ACu3Fe2Re2O12 quadruple perovskites
• Anomalous lattice specific heat and rattling phonon modes in quadruple perovskites