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

T. J. Wieting and J. L. Verble
Phys. Rev. B 3, 4286 – Published 15 June 1971
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Abstract

Infrared and Raman measurements of lattice vibrations in hexagonal MoS2 have been made over the combined range 20-4000 cm1. Two infrared-active modes at 384 and 470 cm1 and three Raman-active modes at 287, 383, and 409 cm1 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 E1u and E2g1 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.

  • Received 22 December 1970

DOI:https://doi.org/10.1103/PhysRevB.3.4286

©1971 American Physical Society

Authors & Affiliations

T. J. Wieting* and J. L. Verble

  • Naval Research Laboratory, Washington, D. C. 20390

  • *National Research Council Research Associate.

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Vol. 3, Iss. 12 — 15 June 1971

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