Microscopic picture of electron-phonon interaction in two-dimensional halide perovskites
| Autor: | Mateusz Dyksik, Shuli Wang, Ermin Malic, David Feldstein, Kenji Watanabe, Paulina Plochocka, Takashi Taniguchi, Raül Perea-Causín |
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| Rok vydání: | 2020 |
| Předmět: |
Condensed Matter::Quantum Gases
Materials science Letter Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Condensed Matter::Other Exciton Electron phonon Halide Physics::Optics FOS: Physical sciences 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 01 natural sciences 0104 chemical sciences Condensed Matter::Materials Science Mesoscale and Nanoscale Physics (cond-mat.mes-hall) General Materials Science Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | The Journal of Physical Chemistry Letters |
| DOI: | 10.48550/arxiv.2010.06905 |
| Popis: | Perovskites have attracted much attention due to their remarkable optical properties. While it is well established that excitons dominate their optical response, the impact of higher excitonic states and formation of phonon sidebands in optical spectra still need to be better understood. Here, we perform a theoretical study on excitonic properties of monolayered hybrid organic perovskites -- supported by temperature-dependent photoluminescence measurements. Solving the Wannier equation, we obtain microscopic access to the Rydberg-like series of excitonic states including their wavefunctions and binding energies. Exploiting the generalized Elliot formula, we calculate the photoluminescence spectra demonstrating a pronounced contribution of a phonon sideband for temperatures up to 50 K -- in agreement with experimental measurements. Finally, we predict temperature-dependent linewidths of the three energetically lowest excitonic transitions and identify the underlying phonon-driven scattering processes. |
| Databáze: | OpenAIRE |
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