Polaron Absorption in a Perovskite Manganite La0.7Ca0.3MnO3

Details Polaron Absorption in a Perovskite Manganite La0.7Ca0.3MnO3 Polaron Absorption in a Perovskite Manganite La0.7Ca0.3MnO3

1998-04-16

arxiv.org/abs/cond-mat/9804167v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages and separate 4 figures

Scientific paper

10.1103/PhysRevLett.81.1517

Temperature dependent optical conductivity spectra of a La0.7Ca0.3MnO3 (LCMO) sample were measured. In the metallic regime at very low temperatures, they clearly showed two types of absorption features, i.e., a sharp Drude peak and a broad mid-infrared absorption band, which could be explained as coherent and incoherent bands of a large lattice polaron. This elementary excitation in LCMO was found to be in a strong coupling regime and to have interactions with the spin degree of freedom.

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