Pressure-Induced Polaronic to Itinerant Electronic Transition in La{sub 1{minus}x}Sr{sub x}MnO{sub 3} Crystals
Journal Article
·
· Physical Review Letters
- Center for Materials Science Engineering, ETC 9.102, University of Texas at Austin, Austin, Texas 78712-1063 (United States)
- Joint Research Center for Atom Technology (JRCAT), Tsukuba 305 (Japan)
- Department of Applied Physics, University of Tokyo, Tokyo 113 (Japan)
Measurements of the temperature dependence of the resistivity {rho}(T) and thermoelectric power {alpha}(T) under several hydrostatic pressures were made on single crystals of La{sub 1{minus}x}Sr {sub x}MnO{sub 3} with x=0.12 and 0.15 in which charge ordering takes place below T{sub co} . We report a transition from the polaronic to an itinerant electronic state in the pressure range 5{lt}P{lt}6 kbar in the x=0.15 sample. The polaronic state is modeled as a mobile three-manganese cluster within a matrix of dynamic Jahn-Teller deformations at Mn( III) ions. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 543869
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 17 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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