First- and second-order Raman scattering from MoTe2 single crystal

  • Simone Caramazza
  • Arianna Collina
  • Elena Stellino
  • Francesca Ripanti
  • Paolo DoreEmail author
  • Paolo Postorino
Regular Article
Part of the following topical collections:
  1. Topical issue: Shaping Nanocatalysts


We report on Raman experiments performed on a MoTe2 single crystal. The system belongs to the wide family of transition metal dichalcogenides which includes several of the most interesting two-dimensional materials for both basic and applied physics. Measurements were performed in the standard basal plane configuration, by placing the ab plane of the crystal perpendicular to the wave vector k i of the incident beam to explore the in-plane vibrational modes, and in the edge plane configuration with k i perpendicular to the crystal c axis, thus mainly exciting out-of-plane modes. For both configurations we performed a polarization-dependent study of the first-order Raman components and detailed computation of the corresponding selection rules. We were thus able to provide a complete assignment of the observed first-order Raman peaks, in agreement with previous literature results. A thorough analysis of the second-order Raman bands, as observed in both basal and edge plane configurations, provides new information and allows a precise assignment of these spectral structures. In particular, we have observed and assigned Raman active modes of the M point of the Brillouin zone previously predicted by ab initio calculations but never previously measured.

Supplementary material


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Copyright information

© EDP Sciences, SIF, Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Simone Caramazza
    • 1
  • Arianna Collina
    • 1
  • Elena Stellino
    • 1
  • Francesca Ripanti
    • 1
  • Paolo Dore
    • 2
    Email author
  • Paolo Postorino
    • 3
  1. 1.Physics Department, Sapienza University of RomeRomaItaly
  2. 2.CNR-SPIN and Physics Department, Sapienza University of RomeRomaItaly
  3. 3.CNR-IOM and Physics Department, Sapienza University of RomeRomaItaly

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