Efficient generation of neutral and charged biexcitons in encapsulated WSe2 monolayers
Abstract
Abstract Higher-order correlated excitonic states arise from the mutual interactions of excitons, which generally requires a significant exciton density and therefore high excitation levels. Here, we report the emergence of two biexcitons species, one neutral and one charged, in monolayer tungsten diselenide under moderate continuous-wave excitation. The efficient formation of biexcitons is facilitated by the long lifetime of the dark exciton state associated with a spin-forbidden transition, as well as improved sample quality from encapsulation between hexagonal boron nitride layers. From studies of the polarization and magnetic field dependence of the neutral biexciton, we conclude that this species is composed of a bright and a dark excitons residing in opposite valleys in momentum space. Our observations demonstrate that the distinctive features associated with biexciton states can be accessed at low light intensities and excitation densities.
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1469032
- Alternate Identifier(s):
- OSTI ID: 1463000
- Report Number(s):
- SLAC-PUB-17316
Journal ID: ISSN 2041-1723; 3718; PII: 5917
- Grant/Contract Number:
- FG02-07ER46451; AC02-76SF00515; GBMF4545
- Resource Type:
- Published Article
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Name: Nature Communications Journal Volume: 9 Journal Issue: 1; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Ye, Ziliang, Waldecker, Lutz, Ma, Eric Yue, Rhodes, Daniel, Antony, Abhinandan, Kim, Bumho, Zhang, Xiao-Xiao, Deng, Minda, Jiang, Yuxuan, Lu, Zhengguang, Smirnov, Dmitry, Watanabe, Kenji, Taniguchi, Takashi, Hone, James, and Heinz, Tony F. Efficient generation of neutral and charged biexcitons in encapsulated WSe2 monolayers. United Kingdom: N. p., 2018.
Web. doi:10.1038/s41467-018-05917-8.
Ye, Ziliang, Waldecker, Lutz, Ma, Eric Yue, Rhodes, Daniel, Antony, Abhinandan, Kim, Bumho, Zhang, Xiao-Xiao, Deng, Minda, Jiang, Yuxuan, Lu, Zhengguang, Smirnov, Dmitry, Watanabe, Kenji, Taniguchi, Takashi, Hone, James, & Heinz, Tony F. Efficient generation of neutral and charged biexcitons in encapsulated WSe2 monolayers. United Kingdom. https://doi.org/10.1038/s41467-018-05917-8
Ye, Ziliang, Waldecker, Lutz, Ma, Eric Yue, Rhodes, Daniel, Antony, Abhinandan, Kim, Bumho, Zhang, Xiao-Xiao, Deng, Minda, Jiang, Yuxuan, Lu, Zhengguang, Smirnov, Dmitry, Watanabe, Kenji, Taniguchi, Takashi, Hone, James, and Heinz, Tony F. Thu .
"Efficient generation of neutral and charged biexcitons in encapsulated WSe2 monolayers". United Kingdom. https://doi.org/10.1038/s41467-018-05917-8.
@article{osti_1469032,
title = {Efficient generation of neutral and charged biexcitons in encapsulated WSe2 monolayers},
author = {Ye, Ziliang and Waldecker, Lutz and Ma, Eric Yue and Rhodes, Daniel and Antony, Abhinandan and Kim, Bumho and Zhang, Xiao-Xiao and Deng, Minda and Jiang, Yuxuan and Lu, Zhengguang and Smirnov, Dmitry and Watanabe, Kenji and Taniguchi, Takashi and Hone, James and Heinz, Tony F.},
abstractNote = {Abstract Higher-order correlated excitonic states arise from the mutual interactions of excitons, which generally requires a significant exciton density and therefore high excitation levels. Here, we report the emergence of two biexcitons species, one neutral and one charged, in monolayer tungsten diselenide under moderate continuous-wave excitation. The efficient formation of biexcitons is facilitated by the long lifetime of the dark exciton state associated with a spin-forbidden transition, as well as improved sample quality from encapsulation between hexagonal boron nitride layers. From studies of the polarization and magnetic field dependence of the neutral biexciton, we conclude that this species is composed of a bright and a dark excitons residing in opposite valleys in momentum space. Our observations demonstrate that the distinctive features associated with biexciton states can be accessed at low light intensities and excitation densities.},
doi = {10.1038/s41467-018-05917-8},
journal = {Nature Communications},
number = 1,
volume = 9,
place = {United Kingdom},
year = {Thu Sep 13 00:00:00 EDT 2018},
month = {Thu Sep 13 00:00:00 EDT 2018}
}
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https://doi.org/10.1038/s41467-018-05917-8
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Cited by: 103 works
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