Metal-insulator transition in manganites: Changes in optical conductivity up to 22 eV

A. Rusydi, R. Rauer, G. Neuber, M. Bastjan, I. Mahns, S. Müller, P. Saichu, B. Schulz, S. G. Singer, A. I. Lichtenstein, D. Qi, X. Gao, X. Yu, A. T.S. Wee, G. Stryganyuk, K. Dörr, G. A. Sawatzky, S. L. Cooper, M. Rübhausen

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish (US)
Article number125110
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number12
StatePublished - Sep 22 2008

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


Dive into the research topics of 'Metal-insulator transition in manganites: Changes in optical conductivity up to 22 eV'. Together they form a unique fingerprint.

Cite this