Infrared and Raman Studies of Long-Wavelength Optical Phonons in Hexagonal MoS2

1971/06/15 by T. J. Wieting, Terence J. Wieting, J. L. Verble · 3 citations
Materials Science · Physics and Astronomy · #Solid-state spectroscopy and crystallography #Semiconductor materials and interfaces #2D Materials and Applications

paper · doi:10.1103/physrevb.3.4286

Abstract

Infrared and Raman measurements of lattice vibrations in hexagonal MoS₂ have been made over the combined range 20-4000 cm^\ensuremath-1. Two infrared-active modes at 384 and 470 cm^\ensuremath-1 and three Raman-active modes at 287, 383, and 409 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_2g¹ 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.

Citations

• Dynamical Theory of Crystal Lattices
• The transition metal dichalcogenides discussion and interpretation of the observed optical, electrical and structural properties
• The Raman effect in crystals

Cited by

• Infrared and Raman active vibrational modes in MoS2‐based nanotubes: Symmetry analysis and first‐principles calculations
• Electron-Paramagnetic-Resonance Studies on Arsenic Acceptors in Natural (2H) and Synthetic (3R) MoS2Crystals
• Layer‐dependent resonant Raman scattering of a few layer MoS2

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