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Revealing The Biexciton And Trion-exciton Complexes In Bn Encapsulated Wse2

Title: Revealing The Biexciton And Trion-exciton Complexes In Bn Encapsulated Wse2.
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Name(s): Li, Zhipeng, author
Wang, Tianmeng, author
Lu, Zhengguang, author
Jin, Chenhao, author
Chen, Yanwen, author
Meng, Yuze, author
Lian, Zhen, author
Taniguchi, Takashi, author
Watanabe, Kenji, author
Zhang, Shengbai, author
Smirnov, Dmitry, author
Shi, Su-Fei, author
Type of Resource: text
Genre: Journal Article
Text
Journal Article
Date Issued: 2018-09-13
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: Strong Coulomb interactions in single-layer transition metal dichalcogenides (TMDs) result in the emergence of strongly bound excitons, trions, and biexcitons. These excitonic complexes possess the valley degree of freedom, which can be exploited for quantum optoelectronics. However, in contrast to the good understanding of the exciton and trion properties, the binding energy of the biexciton remains elusive, with theoretical calculations and experimental studies reporting discrepant results. In this work, we resolve the conflict by employing low-temperature photoluminescence spectroscopy to identify the biexciton state in BN-encapsulated single-layer WSe2. The biexciton state only exists in charge-neutral WSe2, which is realized through the control of efficient electrostatic gating. In the lightly electron-doped WSe2, one free electron binds to a biexciton and forms the trion-exciton complex. Improved understanding of the biexciton and trion-exciton complexes paves the way for exploiting the many-body physics in TMDs for novel optoelectronics applications.
Identifier: FSU_libsubv1_wos_000444494800003 (IID), 10.1038/s41467-018-05863-5 (DOI)
Keywords: transition-metal dichalcogenides, mos2, semiconductor, absorption, monolayer wse2, dark excitons, mono layer
Publication Note: The publisher’s version of record is available at https://doi.org/10.1038/s41467-018-05863-5
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000444494800003
Owner Institution: FSU
Is Part Of: Nature Communications.
2041-1723
Issue: vol. 9

Choose the citation style.
Li, Z., Wang, T., Lu, Z., Jin, C., Chen, Y., Meng, Y., … Shi, S. -F. (2018). Revealing The Biexciton And Trion-exciton Complexes In Bn Encapsulated Wse2. Nature Communications. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000444494800003