Observation of long-lived interlayer excitons in monolayer MoSe2–WSe2 heterostructures

Rivera, Pasqual; Schaibley, John R.; Jones, Aaron M.; Ross, Jason S.; Wu, Sanfeng; Aivazian, Grant; Klement, Philip; Seyler, Kyle; Clark, Genevieve; Ghimire, Nirmal J.; Yan, Jiaqiang; Mandrus, D. G.; Yao, Wang; Xu, Xiaodong

doi:10.1038/ncomms7242

Title: Observation of long-lived interlayer excitons in monolayer MoSe₂–WSe₂ heterostructures

Journal Article · Tue Feb 24 00:00:00 EST 2015 · Nature Communications

DOI:https://doi.org/10.1038/ncomms7242· OSTI ID:1265431

^[1]; Schaibley, John R. ^[1]; Jones, Aaron M. ^[1]; Ross, Jason S. ^[2]; Wu, Sanfeng ^[1]; Aivazian, Grant ^[1]; Klement, Philip ^[1]; Seyler, Kyle ^[1]; Clark, Genevieve ^[2]; Ghimire, Nirmal J. ^[3]; Yan, Jiaqiang ^[4]; Mandrus, D. G. ^[5]; Yao, Wang ^[6];

^[7]

Univ. of Washington, Seattle, WA (United States). Dept. of Physics
Univ. of Washington, Seattle, WA (United States). Dept. of Materials Science and Engineering
Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering
Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering
Univ. of Hong Kong (China). Dept. of Physics and Center of Theoretical and Computational Physics
Univ. of Washington, Seattle, WA (United States). Dept. of Physics; Univ. of Washington, Seattle, WA (United States). Dept. of Materials Science and Engineering

Van der Waals bound heterostructures constructed with two-dimensional materials, such as graphene, boron nitride and transition metal dichalcogenides, have sparked wide interest in both device physics and technologies at the two-dimensional limit. One highly coveted heterostructure is that of differing monolayer transition metal dichalcogenides with type-II band alignment, with bound electrons and holes localized in individual monolayers, that is, interlayer excitons. Here, we report the observation of interlayer excitons in monolayer MoSe₂–WSe₂ heterostructures by photoluminescence and photoluminescence excitation spectroscopy. The energy and luminescence intensity are highly tunable by an applied vertical gate voltage. Moreover, we measure an interlayer exciton lifetime of ~1.8 ns, an order of magnitude longer than intralayer excitons in monolayers. Ultimately, our work demonstrates optical pumping of interlayer electric polarization, which may provoke further exploration of interlayer exciton condensation, as well as new applications in two-dimensional lasers, light-emitting diodes and photovoltaic devices.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); Research Grant Council of Hong Kong

Grant/Contract Number:: AC05-00OR22725; SC0008145; HKU705513P; HKU8/CRF/11G; DGE-0718124

OSTI ID:: 1265431

Journal Information:: Nature Communications, Vol. 6; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 1110 works

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Photocarrier generation from interlayer charge-transfer transitions in WS ₂ -graphene heterostructures Yuan, Long; Chung, Ting-Fung; Kuc, Agnieszka Science Advances, Vol. 4, Issue 2 https://doi.org/10.1126/sciadv.1700324	journal	February 2018
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P-GaSe/N-MoS ₂ Vertical Heterostructures Synthesized by van der Waals Epitaxy for Photoresponse Modulation Zhou, Nan; Wang, Renyan; Zhou, Xing Small, Vol. 14, Issue 7 https://doi.org/10.1002/smll.201702731	journal	January 2018
Van der Waals heterostructures and devices Liu, Yuan; Weiss, Nathan O.; Duan, Xidong Nature Reviews Materials, Vol. 1, Issue 9 https://doi.org/10.1038/natrevmats.2016.42	journal	July 2016
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Electrical control of interlayer exciton dynamics in atomically thin heterostructures Jauregui, Luis A.; Joe, Andrew Y.; Pistunova, Kateryna Science, Vol. 366, Issue 6467 https://doi.org/10.1126/science.aaw4194	journal	November 2019
Atomically Thin Resonant Tunnel Diodes built from Synthetic van der Waals Heterostructures Lin, Yu-Chuan; Ghosh, Ram Krishna; Addou, Rafik arXiv https://doi.org/10.48550/arxiv.1503.05592	text	January 2015
Interplay of valley polarization and dynamic nuclear polarization in 2D transition metal dichalcogenides Sharma, Girish; Economou, Sophia E.; Barnes, Edwin arXiv https://doi.org/10.48550/arxiv.1705.03909	text	January 2017
Enhanced interlayer neutral excitons and trions in trilayer van der Waals heterostructures Choi, Chanyeol; Huang, Jiahui; Cheng, Hung-Chieh arXiv https://doi.org/10.48550/arxiv.1706.05857	text	January 2017
Brightened spin-triplet interlayer excitons and optical selection rules in van der Waals heterobilayers Yu, Hongyi; Liu, Gui-Bin; Yao, Wang arXiv https://doi.org/10.48550/arxiv.1803.01292	text	January 2018
Momentum-space indirect interlayer excitons in transition metal dichalcogenide van der Waals heterostructures Kunstmann, Jens; Mooshammer, Fabian; Nagler, Philipp arXiv https://doi.org/10.48550/arxiv.1803.04936	text	January 2018
Interlayer excitons in transition metal dichalcogenide heterostructures Van der Donck, M.; Peeters, F. M. arXiv https://doi.org/10.48550/arxiv.1809.01065	text	January 2018
Ab initio quantum transport in AB-stacked bilayer penta-silicene using atomic orbitals Chatzikyriakou, Eleni; Karafiloglou, Padeleimon; Kioseoglou, Joseph arXiv https://doi.org/10.48550/arxiv.1809.03477	text	January 2018
Colloquium : Excitons in atomically thin transition metal dichalcogenides Wang, Gang; Chernikov, Alexey; Glazov, Mikhail M. Universität Regensburg https://doi.org/10.5283/epub.40518	text	January 2018
Interlayer-State-Coupling Dependent Ultrafast Charge Transfer in MoS ₂ /WS ₂ Bilayers Zhang, Jin; Hong, Hao; Lian, Chao Advanced Science, Vol. 4, Issue 9 https://doi.org/10.1002/advs.201700086	journal	April 2017
All-Inorganic Perovskite Quantum Dot-Monolayer MoS ₂ Mixed-Dimensional van der Waals Heterostructure for Ultrasensitive Photodetector Wu, Hualin; Si, Haonan; Zhang, Zihan Advanced Science, Vol. 5, Issue 12 https://doi.org/10.1002/advs.201801219	journal	September 2018
Radiatively Limited Dephasing and Exciton Dynamics in MoSe ₂ Monolayers Revealed with Four-Wave Mixing Microscopy Jakubczyk, Tomasz; Delmonte, Valentin; Koperski, Maciej Nano Letters, Vol. 16, Issue 9 https://doi.org/10.1021/acs.nanolett.6b01060	journal	August 2016
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Effective Photoluminescence Imaging of Bubbles in hBN-Encapsulated WSe2 Monolayer Lee, Seong-Yeon; Jeong, Tae-Young; Ahn, Seonghun Nanomaterials, Vol. 10, Issue 2 https://doi.org/10.3390/nano10020350	journal	February 2020
Directional Interlayer Spin-Valley Transfer in Two-Dimensional Heterostructures Schaibley, John R.; Rivera, Pasqual; Yu, Hongyi arXiv https://doi.org/10.48550/arxiv.1612.04863	text	January 2016
Indirect excitons in van der Waals heterostructures at room temperature Calman, E. V.; Fogler, M. M.; Butov, L. V. arXiv https://doi.org/10.48550/arxiv.1709.07043	text	January 2017
Giant magnetic splitting inducing near-unity valley polarization in van der Waals heterostructures Nagler, Philipp; Ballottin, Mariana V.; Mitioglu, Anatolie A. Universität Regensburg https://doi.org/10.5283/epub.36370	text	January 2017

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