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Raman selection rules in C 4 6v hexagonal crystals: allowed combinations and overtones of vibrational modes in wurtzite GaN
Author(s) -
Kunert H. W.
Publication year - 2003
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200310045
Subject(s) - wurtzite crystal structure , hexagonal crystal system , raman spectroscopy , overtone , space group , lattice (music) , phonon , space (punctuation) , spectral line , crystallography , molecular physics , chemistry , materials science , condensed matter physics , physics , quantum mechanics , x ray crystallography , computer science , operating system , acoustics , diffraction
A discrete set of oscillators belongs to the critical points in the lattice vibration spectrum. The vibrational states of crystals are classified according to appropriate irreducible representations of the relevant wave vector space groups. Suitable space‐group selection rules are used to determine the active one and two phonon combinations and overtone processes in hexagonal structures. Experimental Raman spectra of the hexagonal C 4 6v GaN are discussed in terms of the derived selection rules.