Article Electrically tunable layer-hybridized trions in doped WSe2 bilayers

Raul Perea-Causin ORCID ; Samuel Brem ORCID ; Fabian Buchner ; Yao Lu ; Kenji Watanabe SAMURAI ORCID ; Takashi Taniguchi SAMURAI ORCID ; John M. Lupton ; Kai-Qiang Lin ORCID ; Ermin Malic ORCID

s41467-024-50834-8.pdf
Download file (1.8 MB)
Download as zip (1.42 MB)
Collection

Citation
Raul Perea-Causin, Samuel Brem, Fabian Buchner, Yao Lu, Kenji Watanabe, Takashi Taniguchi, John M. Lupton, Kai-Qiang Lin, Ermin Malic. Electrically tunable layer-hybridized trions in doped WSe2 bilayers. Nature Communications. 2024, 15 (1), 6713. https://doi.org/10.1038/s41467-024-50834-8

Description:

(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 tunabil- ity 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 Λ-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 aris- ing 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.

Rights:

Keyword: Van der Waals heterostructures, trions, photoluminescence

Date published: 2024-08-07

Publisher: Springer Science and Business Media LLC

Journal:

  • Nature Communications (ISSN: 20411723) vol. 15 issue. 1 6713

Funding:

  • Ministry of Education, Culture, Sports, Science and Technology JSPS KAKENHI (21H05233)
  • Ministry of Education, Culture, Sports, Science and Technology JSPS KAKENHI (23H02052)
  • Deutsche Forschungsgemeinschaft SFB 1277 (B11 314695032)
  • Deutsche Forschungsgemeinschaft SPP 2244 (443378379)
  • Deutsche Forschungsgemeinschaft SFB 1083 - 542873285

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1038/s41467-024-50834-8

Related item:

Other identifier(s):

Contact agent:

Updated at: 2025-02-05 12:31:41 +0900

Published on MDR: 2025-02-05 12:31:42 +0900

Filename Size
Filename s41467-024-50834-8.pdf (Thumbnail)
application/pdf 		Size 1.8 MB Detail