Zipfel, Jonas and Wagner, Koloman and Semina, Marina A. and Ziegler, Jonas D. and Taniguchi, Takashi and Watanabe, Kenji and Glazov, Mikhail M. and Chernikov, Alexey (2022) Electron recoil effect in electrically tunable MoSe2 monolayers. PHYSICAL REVIEW B, 105 (7): 075311. ISSN 2469-9950, 2469-9969
Full text not available from this repository. (Request a copy)Abstract
Radiative recombination of excitons dressed by the interactions with free charge carriers often occurs under simultaneous excitation of either electrons or holes to unbound states. This phenomenon, known as the electron recoil effect, manifests itself in pronounced, asymmetric spectral line shapes of the resulting emission. We study the electron recoil effect experimentally in electrically tunable monolayer semiconductors and derive it theoretically using both trion and Fermi polaron pictures. Time-resolved analysis of the recoil line shapes is employed to access transient, nonequilibrium states of the exciton-carrier complexes. We demonstrate cooling of the initially overheated populations on picosecond timescales and reveal the impact of lattice temperature and free carrier density. Both thermally activated phonons and the presence of free charges are shown to accelerate equilibration. Finally, we find similar values of relaxation times from recoil analysis and luminescence rise times, providing additional insight into trion dynamics.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TRIONS; ENERGY; EXCITONS; CARRIERS |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 16 Feb 2024 07:58 |
| Last Modified: | 16 Feb 2024 07:58 |
| URI: | https://pred.uni-regensburg.de/id/eprint/57972 |
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