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The double resonance in two‐phonon Raman scattering
Author(s) -
Abdumalikov A. A.,
Klochikhin A. A.
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.2220800104
Subject(s) - cross section (physics) , resonance (particle physics) , phonon , raman scattering , maxima , raman spectroscopy , scattering , physics , x ray raman scattering , constant (computer programming) , nuclear cross section , band gap , condensed matter physics , atomic physics , optics , elastic scattering , quantum mechanics , art , programming language , performance art , computer science , art history
The two‐LO‐phonon and one‐LO plus one‐TO‐phonon Raman scattering cross‐sections are calculated in a two‐band model. Double resonance is taken into account. It is shown that the cross‐section maxima are disposed at incident light frequencies of ω = ϵ g + 2Ω LO and at ω = ϵ g + Ω LO Ω TO for the 2LO and LO + TO cross‐sections. The cross‐sections decrease with increasing |ϵ g – ω| with different laws below and above the band gap ϵ g . The cross‐sections above the band gap are strongly dependent functions of the damping constant of the electron system. The results of the numerical calculation are compared with experimental data.