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Long‐wavelength optical phonons in ZrSe 3
Author(s) -
Zwick A.,
Renucci M. A.
Publication year - 1979
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.2220960232
Subject(s) - phonon , monoclinic crystal system , stacking , wavelength , raman spectroscopy , raman scattering , trigonal crystal system , crystal (programming language) , materials science , center (category theory) , coupling (piping) , molecular physics , optics , scattering , crystallography , crystal structure , condensed matter physics , chemistry , physics , optoelectronics , nuclear magnetic resonance , programming language , computer science , metallurgy
Zone‐center optical phonons in ZrSe 3 , the prototype of the IV B ‐trichalcogenides family, are investigated by Raman scattering for several incident and scattered light polarizations, and by infrared reflectance measurements. These layered compounds are characterized by isolated chains along the b ‐monoclinic axis formed by the linear stacking of distorted trigonal prisms with Se atoms at the corners and Zr atoms in the center. Nine modes are found among the twenty‐ones theoretically predicted. Phonons assignment is made by a group theoretical analysis of the crystal structure, using the correlation method which relates single chain modes to crystal modes as the interchain coupling is truned on.