Experimental evidence for the dynamic Jahn-Teller effect in La{sub 0.65}Ca{sub 0.35}MnO{sub 3}

Journal Article · Thu Aug 01 00:00:00 EDT 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.54.R3694· OSTI ID:286705

Dai, P ^[1]; Zhang, J ^[1]; Mook, H A ^[1]; Liou, S; Dowben, P A ^[2]; Plummer, E W ^[1]

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1. Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
2. Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588-0111 (United States)

Recently, it has been argued that a strong electron-phonon interaction arising from the Jahn-Teller splitting of the outer Mn {ital d} level plays a crucial role in understanding the nonmetal-to-metal transition observed in the La{sub 1{minus}{ital x}}{ital A}{sub {ital x}}MnO{sub 3} ({ital A}=Ca,Sr,Ba) system. We show, by neutron powder diffraction, that La{sub 0.65}Ca{sub 0.35}MnO{sub 3} exhibits an anomalous volume and oxygen/manganese displacement change around {ital T}{sub {ital c}}, in qualitative agreement with the theoretical prediction. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 286705
• Journal Information: Physical Review, B: Condensed Matter, Vol. 54, Issue 6; Other Information: PBD: Aug 1996
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
LANTHANUM OXIDES
JAHN-TELLER EFFECT
CALCIUM OXIDES
MANGANESE OXIDES
QUATERNARY COMPOUNDS
NEUTRON DIFFRACTION
POWDERS
TRANSITION TEMPERATURE
POLYCRYSTALS
METAL-INSULATOR TRANSFORMATIONS