| Autor: |
Sigiro, Mula, Huang, Ying Sheng, Ho, Ching Hwa |
| Zdroj: |
Applied Mechanics and Materials; September 2014, Vol. 627 Issue: 1 p50-53, 4p |
| Abstrakt: |
Single crystals of undoped and Au-doped MoS2 were grown by the chemical vapor transport method using iodine as a transporting agent. The doping effect of the Au was characterized by temperature-dependent piezoreflectance (PzR) spectroscopy measurements in broad range of temperatures from 25 to 300 K. The temperature dependent PzR spectra revealed prominent features in the vicinity of direct-band-edge excitons for both investigated samples. The energies and broadening parameters of the A and B excitons were determined via a detailed line shape fit of the PzR spectra. We observed that Au doping strongly reduces the splitting between A and B excitons as well as it causes the redshift of observed transitions in relation to the undoped MoS2. The origin of observed excitons was discussed. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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