In addition to four E(u) phonons, Nd2CuO4-y single crystals show far-infrared reflectivity peaks which depend on temperature and y. They provide evidence for the insurgence of local modes induced by doping. The so called d- or J-band at approximately 1000 cm-1 can be partially resolved, and shown to be produced by combination bands of those local modes. These results provide direct evidence for polaron formation in this compound.
POLARON IMPRINTS IN THE INFRARED-SPECTRA OF ND2CUO4-Y
P. Calvani;S. Lupi;P. Maselli;A. Paolone;
1994
Abstract
In addition to four E(u) phonons, Nd2CuO4-y single crystals show far-infrared reflectivity peaks which depend on temperature and y. They provide evidence for the insurgence of local modes induced by doping. The so called d- or J-band at approximately 1000 cm-1 can be partially resolved, and shown to be produced by combination bands of those local modes. These results provide direct evidence for polaron formation in this compound.File in questo prodotto:
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