Raman spectroscopy of BeO at low temperatures | Zendy

Devanarayanan S. | Zendy; Morell G. | Zendy; Katiyar R. S. | Zendy

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Raman spectroscopy of BeO at low temperatures

Author(s) -

Devanarayanan S.,

Morell G.,

Katiyar R. S.

Publication year - 1991

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.1250220602

Subject(s) - phonon , raman spectroscopy , raman scattering , analytical chemistry (journal) , crystal (programming language) , spectroscopy , chemistry , dipole , nuclear magnetic resonance , molecular physics , materials science , atomic physics , condensed matter physics , optics , physics , organic chemistry , chromatography , quantum mechanics , computer science , programming language

Polarized first‐order Raman spectra of BeO crystal were recorded at various temperatures to study the variations in frequencies and intensities associated with some of the phonons. At 35 K five modes were assigned to be fundamentals at 338.1 682.6, 726.7 and 1085.8 cm −1 . The different scattering geometries were utilized to study the directional dependence of the dipolar phonons. Two peaks at 703.6 and 1093.7 cm −1 . were the quasi‐TO and LO modes, respectively. Both the frequency and the intensity of the phonons increase with decreasing temperature. The mode at 682.6 cm −1 was examined in more detail at several temperatures.

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