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Description:

We carried out femtosecond time-resolved photoluminescence measurements on monolayer MoS2 on a sapphire substrate. The charge density of the monolayer MoS2 was evaluated by spectroscopic analysis. Time evolutions of exciton and trion luminescence in the femto- and picosecond region were obtained. The rate-equation analysis provided the time constant of exciton relaxation to trion, i.e., trion formation. This time constant was compared with those of other two-dimensional electron systems and is discussed in terms of two dimensionality defined by thickness. This study advances the understanding of exciton physics in low-dimensional systems.

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• In Copyright
  

Keyword: 2D materials, Optical Physics, Trions, Time-resolved spectroscopy

Date published: 2024-12-11

Publisher: American Physical Society (APS)

Journal:

• Physical Review B (ISSN: 1550235X) vol. 110 issue. 23 235412

Funding:

• Japan Society for the Promotion of Science JP26107520
• Japan Society for the Promotion of Science JP16H00908
• Japan Society for the Promotion of Science JP24K06917

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5159

First published URL: https://doi.org/10.1103/physrevb.110.235412

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Updated at: 2024-12-16 16:30:59 +0900

Published on MDR: 2024-12-16 16:30:59 +0900