Volume 36, Number 7, December I 1996
|Page(s)||551 - 556|
|Section||Condensed matter: electronic structure, electrical, magnetic and optical properties|
|Published online||01 September 2002|
On the nature of the absolute maximal observable magneto-optical Kerr rotation of CeSb
Max-Planck Research Group
"Theory of Complex and Correlated
University of Technology -
D-01062 Dresden, Germany
Accepted: 14 October 1996
We report first-principles calculations of the polar magneto-optical (MO) Kerr spectra of the Ce compounds CeSb, , CeTe, and CeSe, using the local-density approximation (LDA) of density-functional theory as well as its generalization which contains an explicit Coulomb interaction U (LDA+U). Although the LDA predicts a large Kerr rotation of about 20 in CeSb, we find that the LDA+U gives a better description of the Kerr spectra of all four compounds. For CeSb the LDA+U predicts a colossal Kerr rotation of 45 up to 60, in agreement with the recent discovery of the maximal observable rotation of 90 in CeSb by Pittini et al. (Phys. Rev. Lett., 77 (1996) 944). The origin of the colossal Kerr rotation realized in CeSb is examined.
PACS: 78.20.Ls – Magnetooptical effects / 71.27.+a – Strongly correlated electron systems / 71.20.-b – Electron density of states
© EDP Sciences, 1996
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