Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2004-06-29
Physics
Condensed Matter
Strongly Correlated Electrons
Scientific paper
Full potential spin-polarized self-consistent electronic structure calculation s have been performed on LaB$_{6}$, EuB$_{6}$ and YbB$_{6}$ using Linear Muffin- Tin Orbital Method. The electronic structure of EuB$_{6}$ shows a small overlap near the Fermi level. This is in disagreement with the recent ARPES study. The r eflectivity spectrum shows a plasma resonance at about 0.3 eV in EuB$_{6}$. Abso rption starts at about 1.5 eV and it is due to 4$f$ to 5$d$ transition. Both the se features are reflected in the magneto-optical Kerr spectrum. At 0.3 eV, there is a rotation of +8$^{0}$ to -10$^{0}$ and at 1.5 eV, a rotation of about 0.5$^ {0}$ occurs. The reasonable agreement with MOKE experiment implies that the incl usion of Drude correction is absolutely essential for the treatment of EuB$_{6}$ .
De Molly
De S. K.
Ghosh Dipta Bhanu
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