| DEGREE OF VALENCE MIXING IN THE METALLIC PHASE OF SmS AND IN TmSe (1976) | |||||||||||||||
Abstract | |||||||||||||||
| We report about the optical reflectivity of TmSe and of the metallic phase of SmS in the photon energy range between 0.03 eV and 12 eV. From the differentially measured lattice constants of both semiconducting and metallic SmS and from the plasma frequency, we deduce an intermediate Sm-valence of 2.85-2.9 in the high pressure phase. Also in TmSe, we conclude from the plasma frequency the existence of about one delocalized electron per Tm-ion. | |||||||||||||||
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