Raja, Archana and Waldecker, Lutz and Zipfel, Jonas and Cho, Yeongsu and Brem, Samuel and Ziegler, Jonas D. and Kulig, Marvin and Taniguchi, Takashi and Watanabe, Kenji and Malic, Ermin and Heinz, Tony F. and Berkelbach, Timothy C. and Chernikov, Alexey (2019) Dielectric disorder in two-dimensional materials. NATURE NANOTECHNOLOGY, 14 (9). 832-+. ISSN 1748-3387, 1748-3395
Full text not available from this repository. (Request a copy)Abstract
Understanding and controlling disorder is key to nanotechnology and materials science. Traditionally, disorder is attributed to local fluctuations of inherent material properties such as chemical and structural composition, doping or strain. Here, we present a fundamentally new source of disorder in nanoscale systems that is based entirely on the local changes of the Coulomb interaction due to fluctuations of the external dielectric environment. Using two-dimensional semiconductors as prototypes, we experimentally monitor dielectric disorder by probing the statistics and correlations of the exciton resonances, and theoretically analyse the influence of external screening and phonon scattering. Even moderate fluctuations of the dielectric environment are shown to induce large variations of the bandgap and exciton binding energies up to the 100 meV range, often making it a dominant source of inhomogeneities. As a consequence, dielectric disorder has strong implications for both the optical and transport properties of nanoscale materials and their heterostructures.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MONOLAYER MOS2; PHOTOLUMINESCENCE; SEMICONDUCTOR; TRANSITION; TRANSPORT; EXCITONS; STATES; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Junior Research Group Alexey Chernikov |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 31 Mar 2020 06:08 |
| Last Modified: | 31 Mar 2020 06:08 |
| URI: | https://pred.uni-regensburg.de/id/eprint/26345 |
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