Lin, Kai-Qiang and Ziegler, Jonas D. and Semina, Marina A. and Mamedov, Javid and Watanabe, Kenji and Taniguchi, Takashi and Bange, Sebastian and Chernikov, Alexey and Glazov, Mikhail M. and Lupton, John M. (2022) High-lying valley-polarized trions in 2D semiconductors. NATURE COMMUNICATIONS, 13 (1): 6980. ISSN 2041-1723
Full text not available from this repository. (Request a copy)Abstract
Here, the authors observe tightly bound, valley-polarized, UV-emissive trions in monolayer transition metal dichalcogenide transistors. These are quasiparticles composed of an electron from a high-lying conduction band with negative effective mass, a hole from the first valence band, and an additional charge from a band-edge state. Optoelectronic functionalities of monolayer transition-metal dichalcogenide (TMDC) semiconductors are characterized by the emergence of externally tunable, correlated many-body complexes arising from strong Coulomb interactions. However, the vast majority of such states susceptible to manipulation has been limited to the region in energy around the fundamental bandgap. We report the observation of tightly bound, valley-polarized, UV-emissive trions in monolayer TMDC transistors: quasiparticles composed of an electron from a high-lying conduction band with negative effective mass, a hole from the first valence band, and an additional charge from a band-edge state. These high-lying trions have markedly different optical selection rules compared to band-edge trions and show helicity opposite to that of the excitation. An electrical gate controls both the oscillator strength and the detuning of the excitonic transitions, and therefore the Rabi frequency of the strongly driven three-level system, enabling excitonic quantum interference to be switched on and off in a deterministic fashion.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | GENERATION; COHERENCE |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group John Lupton |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 16 Feb 2024 05:33 |
| Last Modified: | 16 Feb 2024 05:33 |
| URI: | https://pred.uni-regensburg.de/id/eprint/57856 |
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