Optical evidence for lattice polarons in lightly doped lanthanum manganites in paramagnetic state

被引：3
|
作者：
Mostovshchikova, E. V. [1 ]
机构：
[1] RAS, Inst Met Phys, Ural Div, Ekaterinburg 620990, Russia
来源：
SOLID STATE COMMUNICATIONS | 2010年 / 150卷 / 39-40期
关键词：
Electronic transport; Light absorption and reflection; SINGLE-CRYSTALS; LAMNO3; CONDUCTIVITY; ABSORPTION; TRANSITION; MECHANISMS; TRANSPORT; SPECTRA;
D O I：
10.1016/j.ssc.2010.07.043
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The reflection and absorption spectra and the resistivity data for La0.93Sr0.07MnO3, La0.9Sr0.1MnO3, La0.85Sr0.15MnO3, La0.92Ca0.08MnO3 and La0.85Ba0.15MnO3 single crystals have been collected and analyzed by using small lattice polaron theory. The activation energies of the polaron hop are determined. The lattice polarons are found to be dominated in the electronic transport and optical properties in the paramagnetic state in La0.93Sr0.07MnO3, La0.92Ca0.08MnO3 and La0.85Ba0.15MnO3 crystals. It is shown that lattice polaron involves more than one Mn site. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1884 / 1887
页数：4
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