Journal
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
Volume 249, Issue 12, Pages 2644-2647Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssb.201200389
Keywords
excitons; molybdenum disulfide; photoluminescence; Raman; Stokes shift
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Funding
- European Research Council ERC [259286]
- DFG [SPP 1459]
- [SFB 616]
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We present photoluminescence and resonant Raman measurements of atomically thin layers of molybdenum disulfide (MoS2) 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 A1g mode of the bilayer is six times larger than that of the single layer. [GRAPHICS] Schematic crystal structure of molybdenum disulfide. (a) Top view (slightly tilted). (b) Side view. (C) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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