Abstract
We report non-resonant and resonant Raman scattering studies of layered MoS2. Owing to its reduced dimensionality, few layered MoS2 is more sensitive to the difference between inter- and intra-layer coupling, which results in unusual frequency shifts of the Raman phonon modes. In addition, relative intensities between the two Raman active phonon modes E2g 1 and A1g unexpectedly depend on the laser excitation energy, which might be associated with the electronic band structure, including spin-orbit coupling and phonon dispersions. Through resonant Raman scattering measurements, the indirect-to-direct band gap behavior and electron-phonon interaction information were obtained. Raman scattering spectroscopy is seen to be very effective for studying the layer-dependent characteristics of layered MoS2.
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Jeong, S., Shin, HY., Shin, R.H. et al. Raman scattering studies of the lattice dynamics in layered MoS2 . Journal of the Korean Physical Society 66, 1575–1580 (2015). https://doi.org/10.3938/jkps.66.1575
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DOI: https://doi.org/10.3938/jkps.66.1575