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Resonant Scattering of Phonons in ZnS:Fe 2+ and CdTe:Fe 2+
Author(s) -
Ram P. N.,
Bijalwan R. D.,
Semalty P. D.,
Israel M.
Publication year - 1985
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.2221320205
Subject(s) - phonon , scattering , phonon scattering , condensed matter physics , cadmium telluride photovoltaics , formalism (music) , ion , resonance (particle physics) , thermal conductivity , atomic physics , physics , chemistry , materials science , optics , thermodynamics , optoelectronics , quantum mechanics , art , musical , visual arts
The lattice thermal conductivity of ZnS :Fe 2+ and CdTe: Fe 2+ is analysed on the basis of Callaway's formalism with an emphasis on resonant scattering of phonons from the magnetic levels of the Fe 2+ ions. The resonant scattering of E‐mode phonons corresponding to the T 1 → T 3 transition and T 2 ‐mode phonons corresponding to the T 4 → T 3 transition are found to be important. An expression of resonance phonon scattering rate due to Klein was used which incorporates temperature dependent widths as essentially the only adjustable parameters. The estimated widths in ZnS :Fe 2+ are seen to be low while they are reasonable in CdTe: Fe 2+ . The calculated results are in reasonable agreement with the experimental data.