Abstract
Infrared and Raman measurements of lattice vibrations in hexagonal Mo${\mathrm{S}}_{2}$ have been made over the combined range 20-4000 ${\mathrm{cm}}^{\ensuremath{-}1}$. Two infrared-active modes at 384 and 470 ${\mathrm{cm}}^{\ensuremath{-}1}$ and three Raman-active modes at 287, 383, and 409 ${\mathrm{cm}}^{\ensuremath{-}1}$ have been observed. Classical dielectric oscillators are fitted to the reflectivity data, which are also analyzed by means of the Kramers-Kronig relations. The degeneracy of the ${E}_{1u}$ and ${E}_{2g}^{1}$ modes is interpreted as indicating that the layer-layer interaction is weak. All 15 optical modes are assigned to irreducible representations and their frequencies tabulated or predicted.
Keywords
Raman spectroscopyPhononInfraredHexagonal crystal systemLattice vibrationPhysicsLattice (music)DielectricDegeneracy (biology)Materials scienceCondensed matter physicsCrystallographyOpticsQuantum mechanicsChemistryBioinformatics
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Publication Info
- Year
- 1971
- Type
- article
- Volume
- 3
- Issue
- 12
- Pages
- 4286-4292
- Citations
- 439
- Access
- Closed
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Cite This
Terence J. Wieting,
J. L. Verble
(1971).
Infrared and Raman Studies of Long-Wavelength Optical Phonons in Hexagonal Mo<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">S</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>.
Physical review. B, Solid state
, 3
(12)
, 4286-4292.
https://doi.org/10.1103/physrevb.3.4286
Identifiers
- DOI
- 10.1103/physrevb.3.4286