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|Title:||Metal-insulator transition in manganites: Changes in optical conductivity up to 22 eV||Authors:||Rusydi, A.
|Issue Date:||22-Sep-2008||Citation:||Rusydi, A., Rauer, R., Neuber, G., Bastjan, M., Mahns, I., Müller, S., Saichu, P., Schulz, B., Singer, S.G., Lichtenstein, A.I., Qi, D., Gao, X., Yu, X., Wee, A.T.S., Stryganyuk, G., Dörr, K., Sawatzky, G.A., Cooper, S.L., Rübhausen, M. (2008-09-22). Metal-insulator transition in manganites: Changes in optical conductivity up to 22 eV. Physical Review B - Condensed Matter and Materials Physics 78 (12) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevB.78.125110||Abstract:||The electronic response of doped manganites at the transition from the paramagnetic insulating to the ferromagnetic metallic state in La1-x Cax MnO3 for x=0.3 and 0.2 was investigated by dc conductivity, ellipsometry, and vacuum ultraviolet reflectance for energies between 0 and 22 eV. A stabilized Kramers-Kronig transformation yields the optical conductivity and reveals changes in the optical spectral weight up to 22 eV at the metal-to-insulator transition. In the observed energy range, the spectral weight is conserved within 0.3%. The redistribution of spectral weight in this surprisingly broad energy range has important ramifications for the effective low-energy physics. We discuss the importance of the charge-transfer, Coulomb on-site, Jahn-Teller, and long-range Coulomb screening effects to the electronic structure. © 2008 The American Physical Society.||Source Title:||Physical Review B - Condensed Matter and Materials Physics||URI:||http://scholarbank.nus.edu.sg/handle/10635/113028||ISSN:||10980121||DOI:||10.1103/PhysRevB.78.125110|
|Appears in Collections:||Staff Publications|
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