Hill, Heather M. and Rigosi, Albert F. and Raja, Archana and Chernikov, Alexey and Roquelet, Cyrielle and Heinz, Tony F. (2017) Exciton broadening in WS2/graphene heterostructures. PHYSICAL REVIEW B, 96 (20): 205401. ISSN 2469-9950, 2469-9969
Full text not available from this repository.Abstract
We have used optical spectroscopy to observe spectral broadening of WS2 exciton reflectance peaks in heterostructures of monolayer WS2 capped with mono- to few-layer graphene. The broadening is found to be similar for the A and B excitons and on the order of 5-10 meV. No strong dependence on the number of graphene layers was observed within experimental uncertainty. The broadening can be attributed to charge- and energy-transfer processes between the two materials, providing an observed lower bound for the corresponding time scales of 65 fs.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DER-WAALS HETEROSTRUCTURES; TRANSITION-METAL DICHALCOGENIDES; MONOLAYER MOS2; ENERGY-TRANSFER; 2-DIMENSIONAL MATERIALS; CHARGE-TRANSFER; VALLEY POLARIZATION; TUNGSTEN DISULFIDE; ELECTRIC-FIELD; LAYER MOS2; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Huber > Group Rupert Huber |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Dec 2018 13:19 |
| Last Modified: | 28 Feb 2019 10:05 |
| URI: | https://pred.uni-regensburg.de/id/eprint/1971 |
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