Imaging Charged Exciton Localization in van der Waals WSe2/MoSe2 Heterobilayers

Gabel, Matthew; El-Khoury, Patrick Z.; Gu, Yi

doi:10.1021/acs.jpclett.1c03093

Title: Imaging Charged Exciton Localization in van der Waals WSe₂/MoSe₂ Heterobilayers

Journal Article · Mon Oct 25 00:00:00 EDT 2021 · Journal of Physical Chemistry Letters

DOI:https://doi.org/10.1021/acs.jpclett.1c03093· OSTI ID:1842311

Gabel, Matthew ^[1];

^[2];

^[1]

Washington State Univ., Pullman, WA (United States)
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

Exciton localization in transition-metal dichalcogenide monolayers is behind a variety of interesting phenomena and applications, including broad-spectrum solar cells and singlephoton emissions. Strain fields at the periphery of topographically distinct features such as nanoscopic bubbles were recently associated with localized charge-neutral excitons. Here, we use tip-enhanced photoluminescence (PL) to visualize excitons in WSe₂/MoSe₂ heterobilayers (HBL). We find strong optical emission from charged excitons, particularly positively charged trions, in HBL supported by interlayer charge transfer. Our results reveal strong trion confinement, with a localization length scale comparable to the trion size, at the apex region inside individual nanoscopic bubbles. Nano-PL mapping also shows sub-10 nm spatial variations in the localized trion emission spectra, which stem from atomic-scale potential energy fluctuations. These findings demonstrate the possibility of confining charged exciton complexes that are electrically tunable, opening up further opportunities to probe many-body exciton physics, and to explore additional possible sites for strong exciton localization that can lead to quantum emissions.

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Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC05-76RL01830

OSTI ID:: 1842311

Report Number(s):: PNNL-SA-166318

Journal Information:: Journal of Physical Chemistry Letters, Vol. 12, Issue 43; ISSN 1948-7185

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

References (26)

Strained Bubbles in van der Waals Heterostructures as Local Emitters of Photoluminescence with Adjustable Wavelength Tyurnina, Anastasia V.; Bandurin, Denis A.; Khestanova, Ekaterina ACS Photonics, Vol. 6, Issue 2 https://doi.org/10.1021/acsphotonics.8b01497	journal	January 2019
Biaxial strain tuning of the optical properties of single-layer transition metal dichalcogenides Frisenda, Riccardo; Drüppel, Matthias; Schmidt, Robert npj 2D Materials and Applications, Vol. 1, Issue 1 https://doi.org/10.1038/s41699-017-0013-7	journal	May 2017
Band offsets and heterostructures of two-dimensional semiconductors Kang, Jun; Tongay, Sefaattin; Zhou, Jian Applied Physics Letters, Vol. 102, Issue 1 https://doi.org/10.1063/1.4774090	journal	January 2013
Nanocavity Clock Spectroscopy: Resolving Competing Exciton Dynamics in WSe ₂ /MoSe ₂ Heterobilayers May, Molly A.; Jiang, Tao; Du, Chenfeng Nano Letters, Vol. 21, Issue 1 https://doi.org/10.1021/acs.nanolett.0c03979	journal	December 2020
Optical generation of excitonic valley coherence in monolayer WSe2 Jones, Aaron M.; Yu, Hongyi; Ghimire, Nirmal J. Nature Nanotechnology, Vol. 8, Issue 9 https://doi.org/10.1038/nnano.2013.151	journal	August 2013
Probing Evolution of Twist-Angle-Dependent Interlayer Excitons in MoSe ₂ /WSe ₂ van der Waals Heterostructures Nayak, Pramoda K.; Horbatenko, Yevhen; Ahn, Seongjoon ACS Nano, Vol. 11, Issue 4 https://doi.org/10.1021/acsnano.7b00640	journal	April 2017
Polarization switching and electrical control of interlayer excitons in two-dimensional van der Waals heterostructures Ciarrocchi, Alberto; Unuchek, Dmitrii; Avsar, Ahmet Nature Photonics, Vol. 13, Issue 2 https://doi.org/10.1038/s41566-018-0325-y	journal	December 2018
Hybrid Tip-Enhanced Nanospectroscopy and Nanoimaging of Monolayer WSe ₂ with Local Strain Control Park, Kyoung-Duck; Khatib, Omar; Kravtsov, Vasily Nano Letters, Vol. 16, Issue 4 https://doi.org/10.1021/acs.nanolett.6b00238	journal	March 2016
Nanoscale Heterogeneities in Monolayer MoSe ₂ Revealed by Correlated Scanning Probe Microscopy and Tip-Enhanced Raman Spectroscopy Smithe, Kirby K. H.; Krayev, Andrey V.; Bailey, Connor S. ACS Applied Nano Materials, Vol. 1, Issue 2 https://doi.org/10.1021/acsanm.7b00083	journal	January 2018
Imaging strain-localized excitons in nanoscale bubbles of monolayer WSe2 at room temperature Darlington, Thomas P.; Carmesin, Christian; Florian, Matthias Nature Nanotechnology, Vol. 15, Issue 10 https://doi.org/10.1038/s41565-020-0730-5	journal	July 2020
Tightly bound trions in monolayer MoS2 Mak, Kin Fai; He, Keliang; Lee, Changgu Nature Materials, Vol. 12, Issue 3 https://doi.org/10.1038/nmat3505	journal	December 2012
Dynamic Exciton Funneling by Local Strain Control in a Monolayer Semiconductor Moon, Hyowon; Grosso, Gabriele; Chakraborty, Chitraleema Nano Letters, Vol. 20, Issue 9 https://doi.org/10.1021/acs.nanolett.0c02757	journal	August 2020
Reversible uniaxial strain tuning in atomically thin WSe ₂ Schmidt, Robert; Niehues, Iris; Schneider, Robert 2D Materials, Vol. 3, Issue 2 https://doi.org/10.1088/2053-1583/3/2/021011	journal	June 2016
Room-temperature electrical control of exciton flux in a van der Waals heterostructure Unuchek, Dmitrii; Ciarrocchi, Alberto; Avsar, Ahmet Nature, Vol. 560, Issue 7718 https://doi.org/10.1038/s41586-018-0357-y	journal	July 2018
Tip‐Induced Nano‐Engineering of Strain, Bandgap, and Exciton Funneling in 2D Semiconductors Koo, Yeonjeong; Kim, Yongchul; Choi, Soo Ho Advanced Materials, Vol. 33, Issue 17 https://doi.org/10.1002/adma.202008234	journal	March 2021
Observation of biexcitons in monolayer WSe2 You, Yumeng; Zhang, Xiao-Xiao; Berkelbach, Timothy C. Nature Physics, Vol. 11, Issue 6 https://doi.org/10.1038/nphys3324	journal	May 2015
Selective Chemical Modulation of Interlayer Excitons in Atomically Thin Heterostructures Ji, Jaehoon; Delehey, Charles M.; Houpt, Duncan N. Nano Letters, Vol. 20, Issue 4 https://doi.org/10.1021/acs.nanolett.9b05254	journal	March 2020
Comparable Enhancement of TERS Signals from WSe ₂ on Chromium and Gold Krayev, Andrey; Krylyuk, Sergiy; Ilic, Robert The Journal of Physical Chemistry C, Vol. 124, Issue 16 https://doi.org/10.1021/acs.jpcc.0c01298	journal	April 2020
Strong localization effects in the photoluminescence of transition metal dichalcogenide heterobilayers Rodriguez, A.; Kalbáč, M.; Frank, O. 2D Materials, Vol. 8, Issue 2 https://doi.org/10.1088/2053-1583/abe363	journal	February 2021
Spatially Resolved Mapping of Three-Dimensional Molecular Orientations with ∼2 nm Spatial Resolution through Tip-Enhanced Raman Scattering El-Khoury, Patrick Z.; Aprà, Edoardo The Journal of Physical Chemistry C, Vol. 124, Issue 31 https://doi.org/10.1021/acs.jpcc.0c04263	journal	July 2020
Exciton Binding Energy and Nonhydrogenic Rydberg Series in Monolayer ${WS}_{2}$ Chernikov, Alexey; Berkelbach, Timothy C.; Hill, Heather M. Physical Review Letters, Vol. 113, Issue 7 https://doi.org/10.1103/PhysRevLett.113.076802	journal	August 2014
Giant bandgap renormalization and excitonic effects in a monolayer transition metal dichalcogenide semiconductor Ugeda, Miguel M.; Bradley, Aaron J.; Shi, Su-Fei Nature Materials, Vol. 13, Issue 12 https://doi.org/10.1038/nmat4061	journal	August 2014
Nanobubble induced formation of quantum emitters in monolayer semiconductors Shepard, Gabriella D.; Ajayi, Obafunso A.; Li, Xiangzhi 2D Materials, Vol. 4, Issue 2 https://doi.org/10.1088/2053-1583/aa629d	journal	March 2017
Observation of long-lived interlayer excitons in monolayer MoSe2–WSe2 heterostructures Rivera, Pasqual; Schaibley, John R.; Jones, Aaron M. Nature Communications, Vol. 6, Issue 1 https://doi.org/10.1038/ncomms7242	journal	February 2015
Ambient Tip-Enhanced Photoluminescence with 5 nm Spatial Resolution Wang, Chih-Feng; Zamkov, Mikhail; El-Khoury, Patrick Z. The Journal of Physical Chemistry C, Vol. 125, Issue 22 https://doi.org/10.1021/acs.jpcc.1c04012	journal	May 2021
Probing the Influence of Dielectric Environment on Excitons in Monolayer WSe ₂ : Insight from High Magnetic Fields Stier, Andreas V.; Wilson, Nathan P.; Clark, Genevieve Nano Letters, Vol. 16, Issue 11 https://doi.org/10.1021/acs.nanolett.6b03276	journal	October 2016

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