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Interband optical transitions of Zn (Phys. Status Solidi B 3/2016)
Author(s) -
Karpus V.,
Tumėnas S.,
Eikevičius A.,
Arwin H.
Publication year - 2016
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.201670516
Subject(s) - optical conductivity , brillouin zone , polarization (electrochemistry) , condensed matter physics , perpendicular , materials science , spectral line , conductivity , absorption spectroscopy , optics , physics , chemistry , geometry , mathematics , astronomy , quantum mechanics
The interband optical transitions of zinc occur across the energy gaps which open at intersections of the Fermi surface with the effective Brillouin zone comprised of the 002 and 101 families of Bragg planes. Theoretical spectra of the interband Zn optical conductivities, calculated in a framework of the parallel‐band optical absorption, well reproduce the experimental data measured by spectroscopic ellipsometry (see the Editor's Choice article by Karpus et al. on pp. 419–428 ). There is a good agreement in positions, spectral weights, and polarization dependencies of the theoretical and experimental interband absorption peaks. The determined energy gaps are of Δ 002 = 0.9 eV and Δ 101 = 1.54 eV. At the light polarization perpendicular to the optical axis, the interband transitions occur across the Δ 101 gap only, and a single absorption peak manifests itself in a spectrum of the perpendicular optical conductivity. At the longitudinal polarization, the interband transitions occur across both Δ 101 and Δ 002 gaps, and the longitudinal optical conductivity spectrum is comprised of two corresponding peaks.