Plechinger, G. and Mooshammer, F. and Castellanos-Gomez, A. and Steele, G. A. and Schueller, C. and Korn, T. (2015) Optical spectroscopy of interlayer coupling in artificially stacked MoS2 layers. 2D MATERIALS, 2 (3): 034016. ISSN 2053-1583,
Full text not available from this repository. (Request a copy)Abstract
We perform an optical spectroscopy study to investigate the properties of different artificial MoS2 bi- and trilayer stacks created from individual monolayers by a deterministic transfer process. These twisted bi- and trilayers differ from the common 2H stacking in mineral MoS2 in the relative stacking angle of adjacent layers and the interlayer distance. The combination of Raman spectroscopy, second-harmonic-generation microscopy and photoluminescence measurements allows us to determine the degree of interlayer coupling in our samples. We find that even for electronically decoupled artificial structures, which show the same valley polarization degree as the constituent MoS2 monolayers at low temperatures, there is a resonant energy transfer between individual layers which acts as an effective luminescence quenching mechanism.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TRANSITION-METAL DICHALCOGENIDES; DER-WAALS HETEROSTRUCTURES; MONOLAYER MOS2; VALLEY POLARIZATION; ENERGY-TRANSFER; PHOTOLUMINESCENCE; GRAPHENE; EXCITONS; BILAYERS; WSE2; single-layer molybdenum disulfide; twisted bilayers; optical spectroscopy |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group Christian Schüller |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 07 Jun 2019 12:33 |
| Last Modified: | 07 Jun 2019 12:33 |
| URI: | https://pred.uni-regensburg.de/id/eprint/4852 |
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