Plechinger, Gerd and Nagler, Philipp and Arora, Ashish and Schmidt, Robert and Chernikov, Alexey and Lupton, John M. and Bratschitsch, Rudolf and Schueller, Christian and Korn, Tobias (2017) Valley dynamics of excitons in monolayer dichalcogenides. PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS, 11 (7): UNSP 17001. ISSN 1862-6254, 1862-6270
Full text not available from this repository. (Request a copy)Abstract
Monolayer transition-metal dichalcogenides (TMDCs) have recently emerged as possible candidates for valleytronic applications, as the spin and valley pseudospin are directly coupled and stabilized by a large spin splitting. In these semiconducting materials, optically excited electron-hole pairs form tightly Coulomb-bound excitons with large binding energies. The selection rules for excitonic transitions allow for direct optical generation of a valley-polarized exciton population using resonant excitation. Here, we investigate the exciton valley dynamics in monolayers of three different TMDCs by means of time-resolved Kerr rotation at low temperatures. We observe pronounced differences in the valley dynamics of tungsten- and molybdenum-based TMDCs, which are directly related to the opposite order of the conduction-band spin splitting in these materials. (C) 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MOS2; WSE2; PHOTOLUMINESCENCE; POLARIZATION; DISULFIDE; COHERENCE; HELICITY; FILMS; excitons; transition metal dichalcogenides; two-dimensional materials; valley dynamics; valleytronics |
| 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: | 14 Dec 2018 13:16 |
| Last Modified: | 11 Feb 2019 14:44 |
| URI: | https://pred.uni-regensburg.de/id/eprint/1602 |
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