Characterization of d and f Electronic States in RSn1.1Ge0.9 (R = Gd, Tb) Compounds by Optical Spectroscopy and Electronic-Structure Calculations

Yury V. Knyazev, Alexey V. Lukoyanov, Yury I. Kuz'min, Sachin Gupta, Krishna G. Suresh

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2 Citations (Scopus)

Abstract

This paper presents the results of investigations of the electronic structure and optical properties of the GdSn1.1Ge0.9 and TbSn1.1Ge0.9 compounds. Employing the local spin density approximation accounting for strong electronic correlations in the 4f-shell of rare-earth ions, that is the LSDA + U method, we carry out the spin-polarized calculations of band structure. In a broad range of wavelengths the optical constants of the compounds are measured by an ellipsometry method. A number of spectral and electronic characteristics are calculated. Based on the calculated density of states the structural features of optical conductivity for the investigated intermetallic compounds are interpreted in the region of interband absorption.

Original languageEnglish
Article number1700579
JournalPhysica Status Solidi (B) Basic Research
Volume255
Issue number7
DOIs
Publication statusPublished - Jul 2018
Externally publishedYes

Keywords

  • electronic band structure
  • optical properties
  • optical spectroscopy
  • rare-earth alloys and compounds

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