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

Autor:	E.V. Mostovshchikova
Rok vydání:	2010
Předmět:	Absorption spectroscopy Condensed matter physics Chemistry Doping chemistry.chemical_element General Chemistry Activation energy Condensed Matter Physics Polaron Manganite Paramagnetism Electrical resistivity and conductivity Materials Chemistry Lanthanum
Zdroj:	Solid State Communications. 150:1884-1887
ISSN:	0038-1098
DOI:	10.1016/j.ssc.2010.07.043
Popis:	The reflection and absorption spectra and the resistivity data for La 0.93 Sr 0.07 MnO 3 , La 0.9 Sr 0.1 MnO 3 , La 0.85 Sr 0.15 MnO 3 , La 0.92 Ca 0.08 MnO 3 and La 0.85 Ba 0.15 MnO 3 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 La 0.93 Sr 0.07 MnO 3 , La 0.92 Ca 0.08 MnO 3 and La 0.85 Ba 0.15 MnO 3 crystals. It is shown that lattice polaron involves more than one Mn site.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::84ba63fad7f6c23056822dc2f74ce6e7 https://doi.org/10.1016/j.ssc.2010.07.043 Zobrazit plný text záznamu Full Text from ScienceDirect