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Title: Metal-insulator transition in manganites: Changes in optical conductivity up to 22 eV
Authors: 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.
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.
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
ISSN: 10980121
DOI: 10.1103/PhysRevB.78.125110
Appears in Collections:Staff Publications

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