Issue |
Europhys. Lett.
Volume 36, Number 7, December I 1996
|
|
---|---|---|
Page(s) | 551 - 556 | |
Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
DOI | https://doi.org/10.1209/epl/i1996-00268-x | |
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
Electron Systems”,
University of Technology -
D-01062 Dresden, Germany
Received:
25
April
1996
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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