Comparison between Optical Conductivity Spectrum and Band Structure in LaB 6
1991; Physical Society of Japan; Volume: 60; Issue: 3 Linguagem: Inglês
10.1143/jpsj.60.745
ISSN1347-4073
AutoresShin‐ichi Kimura, Hisatomo Harima, Tokuro Nanba, S. Kunii, T. Kasuya,
Tópico(s)High-pressure geophysics and materials
ResumoThe joint densities of states (JDOS) of LaB 6 were calculated by using the result of the band structure with different 4 f -level positions and compared with the optical conductivity spectrum (σ(ω)) due to the interband transition from 2 eV to 22 eV for the purpose of confirming our previous assignment on the origin of the peaks resolved in σ(ω) and of checking whether the band model is applicable in the present systems. It was found that the peaks at 7 eV and 9 eV in σ(ω) were due to the transition from B-2 p to La-5 d and that at 3.5 eV in σ(ω) was due to the transition between B-2 p bonding and antibonding states and its exciton.
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