Electronic Structure of the Cubic Compounds ReGa3 (Re = Er, Tm, Yb, and Lu)
The electronic structure of ErGa3 and its isostructural compounds with Tm, Yb, and Lu are investigated with a highly accurate band structure scheme in LDA and GGA and warped muffin-tin approximation. In contrast to other investigations, the 4f electrons of the constituent Re are also treated as part...
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| Main Author: | |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2011-01-01
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| Series: | Advances in Condensed Matter Physics |
| Online Access: | http://dx.doi.org/10.1155/2011/867074 |
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| Summary: | The electronic structure of ErGa3 and its isostructural compounds with
Tm, Yb, and Lu are investigated with a highly accurate band structure scheme in LDA and GGA and warped muffin-tin approximation. In contrast to other investigations, the 4f electrons of the constituent Re are also treated as part of the valence bands. The position of the corresponding 4f bands relative to the Fermi energy 𝐸𝐹 strongly depends on the nuclear charge of Re. In Lu, they lie almost by 0.5 Ryd below 𝐸𝐹 and are extremely narrow. In Er, both in LDA and GGA, the 4f bands are found to be very
close to the Fermi level 𝐸𝐹. Assuming most of the 4f electrons to be part
of the core removes the disagreement almost completely but produces a Fermi surface with a topology markedly different from that proposed in
previous investigations. The intersections of the Fermi surface with planes are strongly varying within the Brillouin zone, they do not well match with
the sparse experimental results. Investigations using the LDA+U scheme
as well as investigations of the dielectric response function are sketched. |
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| ISSN: | 1687-8108 1687-8124 |