Effects of magnetic ordering on the anisotropy and temperature dependence of the optical conductivity in A tight-binding approach

K. Ahn, A. Millis

Research output: Contribution to journalArticlepeer-review

81 Scopus citations

Abstract

A tight-binding parametrization of the band structure, along with a mean-field treatment of the Hund, electron-electron, and electron-lattice couplings, is used to obtain the full optical conductivity tensor of (Formula presented) as a function of temperature. We predict striking changes with temperature in the functional form and magnitude of the optical absorption. Comparison of our results with existing data makes it possible to determine the electron-lattice and electron-electron couplings. The effective “Hubbard U” is found to be (Formula presented) eV, rather less than the full bandwidth (Formula presented) eV, putting the material in the weak-intermediate coupling regime.

Original languageEnglish (US)
Pages (from-to)13545-13559
Number of pages15
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume61
Issue number20
DOIs
StatePublished - Jan 1 2000
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Effects of magnetic ordering on the anisotropy and temperature dependence of the optical conductivity in A tight-binding approach'. Together they form a unique fingerprint.

Cite this