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The Optical Activity of Tellurium
Author(s) -
Stolze H.,
Lutz M.,
Grosse P.
Publication year - 1977
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.2220820206
Subject(s) - tellurium , degenerate energy levels , band gap , materials science , matrix (chemical analysis) , condensed matter physics , enhanced data rates for gsm evolution , molecular physics , chemistry , atomic physics , physics , quantum mechanics , telecommunications , computer science , metallurgy , composite material
The optical activity (o. a.) of tellurium samples with carrier concentrations from 10′ 4 to 3 x × 10 18 cm ‐3 is measured between 4 and 300 K. A comparison with the circular dichroism of the band edge shows that the 0.a. is mainly related to interband transitions near the energy gap. The experimental results are interpreted using a quantum‐mechanical model, which allows a calculation of the o.a. from the energy bands and matrix elements. The undoped samples show a characteristic temperature dependence of the o. a., which is caused by the temperature dependence of the energy gap. At low temperatures in degenerate samples depopulation effects in the o.a. are observed.