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Characteristics of a generalized susceptibility for the analysis of lineshapes of Raman spectra
Author(s) -
Takagi Yasunari,
Shigenari Takeshi
Publication year - 1981
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250100130
Subject(s) - raman spectroscopy , phonon , condensed matter physics , spectral line , debye , ising model , transverse field , phase (matter) , physics , field (mathematics) , normal mode , chemistry , quantum mechanics , vibration , mathematics , pure mathematics
The characteristics of the generalized Van Vleck‐Weisskopf–Fröhlich type susceptibility (GVWF) are discussed. It is shown that the GVWF can represent both an oscillator type and a relaxational (Debye) type of phonon mode, usually adopted in the analysis of Raman spectra of soft modes in structural phase transitions. It is also shown that a susceptibility for a Ising‐spin system in a transverse field has a close resemblance to the GVWF.