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Characterization of d and f Electronic States in RSn 1.1 Ge 0.9 (R = Gd, Tb) Compounds by Optical Spectroscopy and Electronic‐Structure Calculations
Author(s) -
Knyazev Yury V.,
Lukoyanov Alexey V.,
Kuz'min Yury I.,
Gupta Sachin,
Suresh Krishna G.
Publication year - 2018
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201700579
Subject(s) - electronic structure , optical conductivity , absorption spectroscopy , characterization (materials science) , spectroscopy , materials science , density of states , intermetallic , absorption (acoustics) , electronic band structure , atomic physics , molecular physics , analytical chemistry (journal) , condensed matter physics , chemistry , physics , optics , nanotechnology , alloy , composite material , chromatography , quantum mechanics
This paper presents the results of investigations of the electronic structure and optical properties of the GdSn 1.1 Ge 0.9 and TbSn 1.1 Ge 0.9 compounds. Employing the local spin density approximation accounting for strong electronic correlations in the 4 f ‐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.