Experimental evidence for the dynamic Jahn-Teller effect in La_0.65Ca_0.35MnO₃

Authors

P. Dai, Oak Ridge National Laboratory
Jiandi Zhang, University of Nebraska-LincolnFollow
H.A. Mook, Oak Ridge National Laboratory
Sy_Hwang Liou, University of Nebraska-LincolnFollow
Peter A. Dowben, University of Nebraska-LincolnFollow
E. Ward Plummer, Oak Ridge National LaboratoryFollow

Date of this Version

8-1-1996

Comments

Published by American Physical Society. Copyright 1996. Permission to use. Phys. Rev. B 54 (1996) R3694-R3697. http://prb.aps.org/.

Abstract

Recently, it has been argued that a strong electron-phonon interaction arising from the Jahn-Teller splitting of the outer Mn d level plays a crucial role in understanding the nonmetal-to-metal transition observed in the La_1-xA_xMnO₃ (A=Ca, Sr, Ba) system. We show, by neutron powder diffraction, that La_0.65Ca_0.35MnO₃ exhibits an anomalous volume and oxygen/manganese displacement change around Tc, in qualitative agreement with the theoretical prediction.