Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2006-09-19
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 4 figures, submitted to Physical Review Letters
Scientific paper
The detailed evolution of the magnitude of the local Jahn-Teller (JT) distortion in La_{1-x} Ca_x Mn O_3 is obtained across the phase diagram for 0 < x < 0.5 from high quality neutron diffraction data using the atomic pair distribution function (PDF) method. A local JT distortion is observed in the insulating phase for all Ca concentrations studied. However, in contrast with earlier local structure studies its magnitude is not constant, but decreases continuously with increasing Ca content. This observation is at odds with a simple small-polaron picture for the insulating state.
Billinge Simon J. L.
Bozin Emil S.
Chatterji Tapan
DeConinck A. J.
Mitchell John F.
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