You are here

Efficient Generation Of Neutral And Charged Biexcitons In Encapsulated Wse2 Monolayers

Title: Efficient Generation Of Neutral And Charged Biexcitons In Encapsulated Wse2 Monolayers.
3 views
0 downloads
Name(s): Ye, Ziliang, author
Waldecker, Lutz, author
Ma, Eric Yue, author
Rhodes, Daniel, author
Antony, Abhinandan, author
Kim, Bumho, author
Zhang, Xiao-Xiao, author
Deng, Minda, author
Jiang, Yuxuan, author
Lu, Zhengguang, author
Smirnov, Dmitry, author
Watanabe, Kenji, author
Taniguchi, Takashi, author
Hone, James, author
Heinz, Tony F., 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: 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.
Identifier: FSU_libsubv1_wos_000444494800002 (IID), 10.1038/s41467-018-05917-8 (DOI)
Keywords: transition-metal dichalcogenides, dark excitons
Publication Note: The publisher’s version of record is available at https://doi.org/10.1038/s41467-018-05917-8
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000444494800002
Owner Institution: FSU
Is Part Of: Nature Communications.
2041-1723
Issue: vol. 9

Choose the citation style.
Ye, Z., Waldecker, L., Ma, E. Y., Rhodes, D., Antony, A., Kim, B., … Heinz, T. F. (2018). Efficient Generation Of Neutral And Charged Biexcitons In Encapsulated Wse2 Monolayers. Nature Communications. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000444494800002