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Longitudinal Photon Drag in p‐Type Tellurium
Author(s) -
Auth J.,
Genzow D.,
Herrmann K. H.,
Wendt M.
Publication year - 1974
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.2220650128
Subject(s) - tellurium , anisotropy , valence (chemistry) , drag , tensor (intrinsic definition) , photon , perpendicular , condensed matter physics , physics , symmetry (geometry) , atomic physics , optics , materials science , geometry , quantum mechanics , mathematics , metallurgy , thermodynamics
The longitudinal photon drag has been studied for free holes in tellurium using a Q‐switched CO 2 laser. A great effect is expected due to the great interband matrix element for allowed direct hole transitions between the sub‐valence bands H 4 and H 5 . Due to the low crystal symmetry interesting anisotropy phenomena take place. The measurements have been performed for a set of samples, oriented either parallel or perpendicular to the c ‐axis. The drag effect connected with sub‐band transitions is dominating as predicted by the theory (tensor coefficient σ 1133 = 5 × 10 −12 cm/V at T = 77 K). The coefficient σ 3311 connected with the absorption of radiation polarized F ω ⊥ c was found to be −1 × 10 −12 cm/V at 77 K.