Moiré potential impedes interlayer exciton diffusion in van der Waals heterostructures
Abstract
The properties of van der Waals heterostructures are drastically altered by a tunable moiré superlattice arising from periodically varying atomic alignment between the layers. Exciton diffusion represents an important channel of energy transport in transition metal dichalcogenides (TMDs). While early studies performed on TMD heterobilayers suggested that carriers and excitons exhibit long diffusion, a rich variety of scenarios can exist. In a moiré crystal with a large supercell and deep potential, interlayer excitons may be completely localized. As the moiré period reduces at a larger twist angle, excitons can tunnel between supercells and diffuse over a longer lifetime. The diffusion should be the longest in commensurate heterostructures where the moiré superlattice is completely absent. Here, we experimentally demonstrate the rich phenomena of interlayer exciton diffusion in WSe2/MoSe2 heterostructures by comparing several samples prepared with chemical vapor deposition and mechanical stacking with accurately controlled twist angles.
- Authors:
-
[1];
[1];
[2];
[1];
[5];
[6];
[1];
[1];
[8]
- Department of Physics, Complex Quantum Systems, and Texas Materials Institute, The University of Texas at Austin, Austin, TX 78712, USA.
- Department of Electrophysics, National Chiao Tung University, Hsinchu 30010, Taiwan.
- Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan.
- Department of Physics, Complex Quantum Systems, and Texas Materials Institute, The University of Texas at Austin, Austin, TX 78712, USA., Department of Physics, National Tsing-Hua University, Hsinchu 30013, Taiwan., Research Center for Applied Sciences, Academia Sinica, Nankang, Taipei 11529, Taiwan.
- National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
- Department of Physics, National Tsing-Hua University, Hsinchu 30013, Taiwan., Research Center for Applied Sciences, Academia Sinica, Nankang, Taipei 11529, Taiwan.
- Department of Photonics and Nanoelectronics, Hanyang University, Ansan 15588, Republic of Korea.
- Department of Electrophysics, National Chiao Tung University, Hsinchu 30010, Taiwan., Center for Emergent Functional Matter Science (CEFMS), National Chiao Tung University, Hsinchu 30010, Taiwan.
- Publication Date:
- Research Org.:
- Univ. of Texas, Austin, TX (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1664585
- Alternate Identifier(s):
- OSTI ID: 1803788
- Grant/Contract Number:
- SC0019398
- Resource Type:
- Published Article
- Journal Name:
- Science Advances
- Additional Journal Information:
- Journal Name: Science Advances Journal Volume: 6 Journal Issue: 39; Journal ID: ISSN 2375-2548
- Publisher:
- American Association for the Advancement of Science (AAAS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Science & Technology - Other Topics
Citation Formats
Choi, Junho, Hsu, Wei-Ting, Lu, Li-Syuan, Sun, Liuyang, Cheng, Hui-Yu, Lee, Ming-Hao, Quan, Jiamin, Tran, Kha, Wang, Chun-Yuan, Staab, Matthew, Jones, Kayleigh, Taniguchi, Takashi, Watanabe, Kenji, Chu, Ming-Wen, Gwo, Shangjr, Kim, Suenne, Shih, Chih-Kang, Li, Xiaoqin, and Chang, Wen-Hao. Moiré potential impedes interlayer exciton diffusion in van der Waals heterostructures. United States: N. p., 2020.
Web. doi:10.1126/sciadv.aba8866.
Choi, Junho, Hsu, Wei-Ting, Lu, Li-Syuan, Sun, Liuyang, Cheng, Hui-Yu, Lee, Ming-Hao, Quan, Jiamin, Tran, Kha, Wang, Chun-Yuan, Staab, Matthew, Jones, Kayleigh, Taniguchi, Takashi, Watanabe, Kenji, Chu, Ming-Wen, Gwo, Shangjr, Kim, Suenne, Shih, Chih-Kang, Li, Xiaoqin, & Chang, Wen-Hao. Moiré potential impedes interlayer exciton diffusion in van der Waals heterostructures. United States. https://doi.org/10.1126/sciadv.aba8866
Choi, Junho, Hsu, Wei-Ting, Lu, Li-Syuan, Sun, Liuyang, Cheng, Hui-Yu, Lee, Ming-Hao, Quan, Jiamin, Tran, Kha, Wang, Chun-Yuan, Staab, Matthew, Jones, Kayleigh, Taniguchi, Takashi, Watanabe, Kenji, Chu, Ming-Wen, Gwo, Shangjr, Kim, Suenne, Shih, Chih-Kang, Li, Xiaoqin, and Chang, Wen-Hao. Fri .
"Moiré potential impedes interlayer exciton diffusion in van der Waals heterostructures". United States. https://doi.org/10.1126/sciadv.aba8866.
@article{osti_1664585,
title = {Moiré potential impedes interlayer exciton diffusion in van der Waals heterostructures},
author = {Choi, Junho and Hsu, Wei-Ting and Lu, Li-Syuan and Sun, Liuyang and Cheng, Hui-Yu and Lee, Ming-Hao and Quan, Jiamin and Tran, Kha and Wang, Chun-Yuan and Staab, Matthew and Jones, Kayleigh and Taniguchi, Takashi and Watanabe, Kenji and Chu, Ming-Wen and Gwo, Shangjr and Kim, Suenne and Shih, Chih-Kang and Li, Xiaoqin and Chang, Wen-Hao},
abstractNote = {The properties of van der Waals heterostructures are drastically altered by a tunable moiré superlattice arising from periodically varying atomic alignment between the layers. Exciton diffusion represents an important channel of energy transport in transition metal dichalcogenides (TMDs). While early studies performed on TMD heterobilayers suggested that carriers and excitons exhibit long diffusion, a rich variety of scenarios can exist. In a moiré crystal with a large supercell and deep potential, interlayer excitons may be completely localized. As the moiré period reduces at a larger twist angle, excitons can tunnel between supercells and diffuse over a longer lifetime. The diffusion should be the longest in commensurate heterostructures where the moiré superlattice is completely absent. Here, we experimentally demonstrate the rich phenomena of interlayer exciton diffusion in WSe2/MoSe2 heterostructures by comparing several samples prepared with chemical vapor deposition and mechanical stacking with accurately controlled twist angles.},
doi = {10.1126/sciadv.aba8866},
journal = {Science Advances},
number = 39,
volume = 6,
place = {United States},
year = {2020},
month = {9}
}
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1126/sciadv.aba8866
https://doi.org/10.1126/sciadv.aba8866
Other availability
Search WorldCat to find libraries that may hold this journal
Cited by: 39 works
Citation information provided by
Web of Science
Web of Science
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.
Works referenced in this record:
Moiré excitons: From programmable quantum emitter arrays to spin-orbit–coupled artificial lattices
journal, November 2017
- Yu, Hongyi; Liu, Gui-Bin; Tang, Jianju
- Science Advances, Vol. 3, Issue 11
Quantum diffusion of dipole-oriented indirect excitons in coupled quantum wells
journal, August 2002
- Ivanov, A. L.
- Europhysics Letters (EPL), Vol. 59, Issue 4
Optical properties of pyrolytic boron nitride in the energy range 0.05—10 eV
journal, November 1984
- Hoffman, D. M.; Doll, G. L.; Eklund, P. C.
- Physical Review B, Vol. 30, Issue 10
Exciton diffusion in WSe 2 monolayers embedded in a van der Waals heterostructure
journal, April 2018
- Cadiz, F.; Robert, C.; Courtade, E.
- Applied Physics Letters, Vol. 112, Issue 15
Exciton Diffusion and Halo Effects in Monolayer Semiconductors
journal, May 2018
- Kulig, Marvin; Zipfel, Jonas; Nagler, Philipp
- Physical Review Letters, Vol. 120, Issue 20
Band offsets and heterostructures of two-dimensional semiconductors
journal, January 2013
- Kang, Jun; Tongay, Sefaattin; Zhou, Jian
- Applied Physics Letters, Vol. 102, Issue 1
Nonlinear dynamics of a dense two-dimensional dipolar exciton gas
journal, January 2006
- Rapaport, Ronen; Chen, Gang; Simon, Steven H.
- Physical Review B, Vol. 73, Issue 3
Unconventional superconductivity in magic-angle graphene superlattices
journal, March 2018
- Cao, Yuan; Fatemi, Valla; Fang, Shiang
- Nature, Vol. 556, Issue 7699
Gate-induced superconductivity in atomically thin MoS2 crystals
journal, January 2016
- Costanzo, Davide; Jo, Sanghyun; Berger, Helmuth
- Nature Nanotechnology, Vol. 11, Issue 4
Full superconducting dome of strong Ising protection in gated monolayer WS 2
journal, March 2018
- Lu, Jianming; Zheliuk, Oleksandr; Chen, Qihong
- Proceedings of the National Academy of Sciences, Vol. 115, Issue 14
Valley-polarized exciton currents in a van der Waals heterostructure
journal, October 2019
- Unuchek, Dmitrii; Ciarrocchi, Alberto; Avsar, Ahmet
- Nature Nanotechnology, Vol. 14, Issue 12
Tunable moiré bands and strong correlations in small-twist-angle bilayer graphene
journal, March 2017
- Kim, Kyounghwan; DaSilva, Ashley; Huang, Shengqiang
- Proceedings of the National Academy of Sciences, Vol. 114, Issue 13
Exciton Dynamics, Transport, and Annihilation in Atomically Thin Two-Dimensional Semiconductors
journal, July 2017
- Yuan, Long; Wang, Ti; Zhu, Tong
- The Journal of Physical Chemistry Letters, Vol. 8, Issue 14
Theory of optical absorption by interlayer excitons in transition metal dichalcogenide heterobilayers
journal, January 2018
- Wu, Fengcheng; Lovorn, Timothy; MacDonald, A. H.
- Physical Review B, Vol. 97, Issue 3
Moiré Intralayer Excitons in a MoSe 2 /MoS 2 Heterostructure
journal, November 2018
- Zhang, Nan; Surrente, Alessandro; Baranowski, Michał
- Nano Letters, Vol. 18, Issue 12
Hofstadter’s butterfly and the fractal quantum Hall effect in moiré superlattices
journal, May 2013
- Dean, C. R.; Wang, L.; Maher, P.
- Nature, Vol. 497, Issue 7451
Vertical and in-plane heterostructures from WS2/MoS2 monolayers
journal, September 2014
- Gong, Yongji; Lin, Junhao; Wang, Xingli
- Nature Materials, Vol. 13, Issue 12, p. 1135-1142
Signatures of moiré-trapped valley excitons in MoSe2/WSe2 heterobilayers
journal, February 2019
- Seyler, Kyle L.; Rivera, Pasqual; Yu, Hongyi
- Nature, Vol. 567, Issue 7746
High-temperature superfluidity with indirect excitons in van der Waals heterostructures
journal, July 2014
- Fogler, M. M.; Butov, L. V.; Novoselov, K. S.
- Nature Communications, Vol. 5, Issue 1
Valley-polarized exciton dynamics in a 2D semiconductor heterostructure
journal, February 2016
- Rivera, P.; Seyler, K. L.; Yu, H.
- Science, Vol. 351, Issue 6274
Evidence for moiré excitons in van der Waals heterostructures
journal, February 2019
- Tran, Kha; Moody, Galan; Wu, Fengcheng
- Nature, Vol. 567, Issue 7746
Observation of moiré excitons in WSe2/WS2 heterostructure superlattices
journal, February 2019
- Jin, Chenhao; Regan, Emma C.; Yan, Aiming
- Nature, Vol. 567, Issue 7746
Second Harmonic Generation from Artificially Stacked Transition Metal Dichalcogenide Twisted Bilayers
journal, February 2014
- Hsu, Wei-Ting; Zhao, Zi-Ang; Li, Lain-Jong
- ACS Nano, Vol. 8, Issue 3
Electronic properties of the MoS -WS heterojunction
journal, February 2013
- Kośmider, K.; Fernández-Rossier, J.
- Physical Review B, Vol. 87, Issue 7
Imaging of pure spin-valley diffusion current in WS 2 -WSe 2 heterostructures
journal, May 2018
- Jin, Chenhao; Kim, Jonghwan; Utama, M. Iqbal Bakti
- Science, Vol. 360, Issue 6391
Fast pick up technique for high quality heterostructures of bilayer graphene and hexagonal boron nitride
journal, July 2014
- Zomer, P. J.; Guimarães, M. H. D.; Brant, J. C.
- Applied Physics Letters, Vol. 105, Issue 1
Twist-angle-dependent interlayer exciton diffusion in WS2–WSe2 heterobilayers
journal, May 2020
- Yuan, Long; Zheng, Biyuan; Kunstmann, Jens
- Nature Materials, Vol. 19, Issue 6
Negative circular polarization emissions from WSe2/MoSe2 commensurate heterobilayers
journal, April 2018
- Hsu, Wei-Ting; Lu, Li-Syuan; Wu, Po-Hsun
- Nature Communications, Vol. 9, Issue 1
Correlated insulator behaviour at half-filling in magic-angle graphene superlattices
journal, March 2018
- Cao, Yuan; Fatemi, Valla; Demir, Ahmet
- Nature, Vol. 556, Issue 7699
Dielectric disorder in two-dimensional materials
journal, August 2019
- Raja, Archana; Waldecker, Lutz; Zipfel, Jonas
- Nature Nanotechnology, Vol. 14, Issue 9
Density Enhanced Diffusion of Dipolar Excitons within a One-Dimensional Channel
journal, September 2009
- Vögele, X. P.; Schuh, D.; Wegscheider, W.
- Physical Review Letters, Vol. 103, Issue 12
Determination of band alignment in the single-layer MoS2/WSe2 heterojunction
journal, July 2015
- Chiu, Ming-Hui; Zhang, Chendong; Shiu, Hung-Wei
- Nature Communications, Vol. 6, Issue 1
Monolayer MoSe 2 Grown by Chemical Vapor Deposition for Fast Photodetection
journal, July 2014
- Chang, Yung-Huang; Zhang, Wenjing; Zhu, Yihan
- ACS Nano, Vol. 8, Issue 8
Van der Waals heterostructures and devices
journal, July 2016
- Liu, Yuan; Weiss, Nathan O.; Duan, Xidong
- Nature Reviews Materials, Vol. 1, Issue 9
Anomalous Light Cones and Valley Optical Selection Rules of Interlayer Excitons in Twisted Heterobilayers
journal, October 2015
- Yu, Hongyi; Wang, Yong; Tong, Qingjun
- Physical Review Letters, Vol. 115, Issue 18
Long-Lived Direct and Indirect Interlayer Excitons in van der Waals Heterostructures
journal, August 2017
- Miller, Bastian; Steinhoff, Alexander; Pano, Borja
- Nano Letters, Vol. 17, Issue 9
Room-temperature electrical control of exciton flux in a van der Waals heterostructure
journal, July 2018
- Unuchek, Dmitrii; Ciarrocchi, Alberto; Avsar, Ahmet
- Nature, Vol. 560, Issue 7718
Electrical control of interlayer exciton dynamics in atomically thin heterostructures
journal, November 2019
- Jauregui, Luis A.; Joe, Andrew Y.; Pistunova, Kateryna
- Science, Vol. 366, Issue 6467
Probing Symmetry Properties of Few-Layer MoS 2 and h-BN by Optical Second-Harmonic Generation
journal, June 2013
- Li, Yilei; Rao, Yi; Mak, Kin Fai
- Nano Letters, Vol. 13, Issue 7
Theory of two-dimensional spatially indirect equilibrium exciton condensates
journal, October 2015
- Wu, Feng-Cheng; Xue, Fei; MacDonald, A. H.
- Physical Review B, Vol. 92, Issue 16
Giant magnetic splitting inducing near-unity valley polarization in van der Waals heterostructures
journal, November 2017
- Nagler, Philipp; Ballottin, Mariana V.; Mitioglu, Anatolie A.
- Nature Communications, Vol. 8, Issue 1
Large-Area Synthesis of Highly Crystalline WSe 2 Monolayers and Device Applications
journal, December 2013
- Huang, Jing-Kai; Pu, Jiang; Hsu, Chang-Lung
- ACS Nano, Vol. 8, Issue 1
Topological Exciton Bands in Moiré Heterojunctions
journal, April 2017
- Wu, Fengcheng; Lovorn, Timothy; MacDonald, A. H.
- Physical Review Letters, Vol. 118, Issue 14
Observation of intense second harmonic generation from MoS atomic crystals
journal, May 2013
- Malard, Leandro M.; Alencar, Thonimar V.; Barboza, Ana Paula M.
- Physical Review B, Vol. 87, Issue 20
Observation of long-lived interlayer excitons in monolayer MoSe2–WSe2 heterostructures
journal, February 2015
- Rivera, Pasqual; Schaibley, John R.; Jones, Aaron M.
- Nature Communications, Vol. 6, Issue 1
Interlayer couplings, Moiré patterns, and 2D electronic superlattices in MoS 2 /WSe 2 hetero-bilayers
journal, January 2017
- Zhang, Chendong; Chuu, Chih-Piao; Ren, Xibiao
- Science Advances, Vol. 3, Issue 1