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Intervalence band transitions in tellurium. II. Polarization E ⟂ c
Author(s) -
Bangert E.,
Fischer D.,
Grosse P.
Publication year - 1973
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.2220590206
Subject(s) - tellurium , quadrupole , valence band , polarization (electrochemistry) , chemistry , atomic physics , absorption band , physics , condensed matter physics , band gap , optics , inorganic chemistry
Abstract For the polarization E ⟂ c a weak absorption band dependent on hole concentration was found in tellurium in the spectral range 50 to 200 meV. This absorption is found at low temperatures and for hole concentrations > 10 17 cm −3 It can be explained by intervalence band transitions H 6 ‐H 4 on the basis of the k · p perturbation treatment of part I. Further‐more the coupling between the valence bands H 6 , H 4 and their energetic distance are determined. Other possible interpretations for the absorption band – the quadrupole and the forbidden transitions between the H 5 , H 4 bands – are discussed.