1998/04/27 by Kee Hoon Kim, K. H. Kim, Jong Hoon Jung +8 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Thermal Expansion and Ionic Conductivity #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.81.4983
Latex 2e, 8 pages including 4 postscript figures, submitted at Apr 23
arxiv created 1998/04/27 · openalex publication_date 1998/11/30 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Optical conductivity spectra of La_0.7\ensuremath-yPryCa0.3MnO3 were systematically investigated. For metallic samples, the spectral weight below 0.5 eV, whose magnitude can be represented by an effective carrier number Neff(0.5eV), increases as temperature becomes lower. Regardless of the Pr doping, all the measured values of Neff(0.5eV)/TC fall into one scaling curve. This scaling behavior could be explained by the theoretical model by R"oder et al. [Phys. Rev. Lett. 76, 1356 (1996)], which includes spin double exchange and Jahn-Teller lattice coupling to holes.