Perea-Causin, Raul and Brem, Samuel and Buchner, Fabian and Lu, Yao and Watanabe, Kenji and Taniguchi, Takashi and Lupton, John M. and Lin, Kai-Qiang and Malic, Ermin (2024) Electrically tunable layer-hybridized trions in doped WSe2 bilayers. NATURE COMMUNICATIONS, 15 (1): 6713. ISSN 2041-1723
Full text not available from this repository. (Request a copy)Abstract
Doped van der Waals heterostructures host layer-hybridized trions, i.e. charged excitons with layer-delocalized constituents holding promise for highly controllable optoelectronics. Combining a microscopic theory with photoluminescence (PL) experiments, we demonstrate the electrical tunability of the trion energy landscape in naturally stacked WSe2 bilayers. We show that an out-of-plane electric field modifies the energetic ordering of the lowest lying trion states, which consist of layer-hybridized Lambda-point electrons and layer-localized K-point holes. At small fields, intralayer-like trions yield distinct PL signatures in opposite doping regimes characterized by weak Stark shifts in both cases. Above a doping-asymmetric critical field, interlayer-like species are energetically favored and produce PL peaks with a pronounced Stark red-shift and a counter-intuitively large intensity arising from efficient phonon-assisted recombination. Our work presents an important step forward in the microscopic understanding of layer-hybridized trions in van der Waals heterostructures and paves the way towards optoelectronic applications based on electrically controllable atomically-thin semiconductors.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | EXCITONS; SEMICONDUCTOR; PHOTOLUMINESCENCE; DYNAMICS |
| 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: | 27 Jan 2026 10:35 |
| Last Modified: | 27 Jan 2026 10:35 |
| URI: | https://pred.uni-regensburg.de/id/eprint/64733 |
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