ELECTRONIC RAMAN-SCATTERING FROM LA0.7SR0.3MNO3 EXHIBITING GIANT MAGNETORESISTANCE

Raman scattering experiments on metallic La0.7Sr0.3MnO3 have been carr ied out using different excitation wavelengths as a function of temper ature from 15 K to 300 K. Our data suggest a Raman mode attributed to electronic excitations centered at 2100 cm(-1) whose intensity decreas es with increasing temperature. if the Raman mode is attributed to sin gle-particle excitation associated with the fluctuations of the mass t ensor, the decreased intensity would then imply a reduction in the den sity of states at the Fermi energy with increasing temperature.