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Sánchez MC, Subías G, García J, et al. Cooperative Jahn-Teller phase transition in LaMnO3 studied by X-ray absorption spectroscopy. Phys Rev Lett. 2003;90(4):045503doi: 10.1103/PhysRevLett.90.045503.
Sánchez, M. C., Subías, G., García, J., & Blasco, J. (2003). Cooperative Jahn-Teller phase transition in LaMnO3 studied by X-ray absorption spectroscopy. Physical review letters, 90(4), 045503. https://doi.org/10.1103/PhysRevLett.90.045503
Sánchez, M C, et al. "Cooperative Jahn-Teller phase transition in LaMnO3 studied by X-ray absorption spectroscopy." Physical review letters vol. 90,4 (2003): 045503. doi: https://doi.org/10.1103/PhysRevLett.90.045503
Sánchez MC, Subías G, García J, Blasco J. Cooperative Jahn-Teller phase transition in LaMnO3 studied by X-ray absorption spectroscopy. Phys Rev Lett. 2003 Jan 31;90(4):045503. doi: 10.1103/PhysRevLett.90.045503. Epub 2003 Jan 31. PMID: 12570431.
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Phys Rev Lett. 2003 Jan 31;90(4):045503. doi: 10.1103/PhysRevLett.90.045503. Epub 2003 Jan 31.

Cooperative Jahn-Teller phase transition in LaMnO3 studied by X-ray absorption spectroscopy.

Physical review letters

M C Sánchez, G Subías, J García, J Blasco

Affiliations

  1. Instituto de Ciencia de Materiales de Aragón, Consejo Superior de Investigaciones Científicas y Universidad de Zaragoza, 50009 Zaragoza, Spain.

PMID: 12570431 DOI: 10.1103/PhysRevLett.90.045503

Abstract

The local structure of LaMnO3 across the Jahn-Teller (JT) transition at T(JT)=750 K was studied by means of x-ray absorption near edge structure and extended x-ray absorption fine structure at the Mn K-edge. Our results indicate a similar electronic local structure for Mn atoms above and below T(JT) and a dynamical tetragonal JT distortion of MnO6 octahedra above T(JT). The structural transition is originated by the ordering of tetragonally distorted octahedra. The entropy content of the transition is analyzed within the framework of the three-state Potts model with nearest neighbor antiferrodistortive coupling.

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