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Resonant Raman profiles and µ‐photoluminescence of atomically thin layers of molybdenum disulfide
Author(s) -
Scheuschner Nils,
Ochedowski Oliver,
Schleberger Marika,
Maultzsch Janina
Publication year - 2012
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201200389
Subject(s) - molybdenum disulfide , photoluminescence , raman spectroscopy , bilayer , materials science , resonance (particle physics) , molybdenum , raman scattering , thin film , stokes shift , analytical chemistry (journal) , optoelectronics , chemistry , optics , nanotechnology , atomic physics , luminescence , physics , biochemistry , chromatography , membrane , metallurgy
Abstract We present photoluminescence and resonant Raman measurements of atomically thin layers of molybdenum disulfide (MoS 2 ) in the energy range of the A and B optical transitions. We found a Stokes shift of the transition energies in the resonant Raman measurements compared to the photoluminescence. The Stokes shift increases for the bilayer compared to the single layer. Furthermore, in resonance with the A transition, the Raman intensity of the A 1 g mode of the bilayer is six times larger than that of the single layer.Schematic crystal structure of molybdenum disulfide. (a) Top view (slightly tilted). (b) Side view.