期刊论文详细信息
Electronic Raman scattering from La0.7Sr0.3MnO3 exhibiting giant magnetoresistance
Article
关键词: CARRIER-DENSITY FLUCTUATIONS;    DOUBLE-EXCHANGE;    LA1-XSRXMNO3;    RESISTIVITY;    INTERVALLEY;    MN;   
DOI  :  10.1103/PhysRevB.54.14899
来源: SCIE
【 摘 要 】

Raman scattering experiments on metallic La0.7Sr0.3MnO3 have been carried out using different excitation wavelengths as a function of temperature from 15 K to 300 K. Our data suggest a Raman mode attributed to electronic excitations centered at 2100 cm(-1) whose intensity decreases with increasing temperature. if the Raman mode is attributed to single-particle excitation associated with the fluctuations of the mass tensor, the decreased intensity would then imply a reduction in the density of states at the Fermi energy with increasing temperature.

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