Every-other-layer dipolar excitons in a spin-valley locked superlattice

Zhang, Yinong; Xiao, Chengxin; Ovchinnikov, Dmitry; Zhu, Jiayi; Wang, Xi; Taniguchi, Takashi; Watanabe, Kenji; Yan, Jiaqiang; Yao, Wang; Xu, Xiaodong

doi:10.1038/s41565-023-01350-1

Every-other-layer dipolar excitons in a spin-valley locked superlattice

Journal Article · Thu Mar 23 00:00:00 EDT 2023 · Nature Nanotechnology

DOI:https://doi.org/10.1038/s41565-023-01350-1· OSTI ID:1986200

^[1]; ^[2]; Ovchinnikov, Dmitry ^[1]; Zhu, Jiayi ^[1]; ^[1]; ^[3]; ^[3]; ^[4]; ^[2]; ^[1]

Univ. of Washington, Seattle, WA (United States)
Univ. of Hong Kong (Hong Kong); HKU-UCAS Joint Institute of Theoretical and Computational Physics (Hong Kong)
National Institute for Materials Science (NIMS), Tsukuba (Japan)
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Monolayer semiconducting transition metal dichalcogenides possess broken inversion symmetry and strong spin-orbit coupling, leading to a unique spin-valley locking effect. In 2H stacked pristine multilayers, spin-valley locking yields an electronic superlattice structure, where alternating layers correspond to barriers and quantum wells depending on the spin-valley indices. Here, in this work, we show that the spin-valley locked superlattice hosts a kind of dipolar exciton with the electron and hole constituents separated in an every-other-layer configuration: that is, either in two even or two odd layers. Such excitons become optically bright via hybridization with intralayer excitons. This effect is also manifested by the presence of multiple anti-crossing patterns in the reflectance spectra, as the dipolar exciton is tuned through the intralayer resonance by an electric field. The reflectance spectra further reveal an excited state orbital of the every-other-layer exciton, pointing to a sizable binding energy in the same order of magnitude as the intralayer exciton. As layer thickness increases, the dipolar exciton can form a one-dimensional Bose–Hubbard chain displaying layer number-dependent fine spectroscopy structures.

View Accepted Manuscript (DOE)

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

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); National Science Foundation (NSF)

Grant/Contract Number:: AC05-00OR22725; SC0018171

OSTI ID:: 1986200

Journal Information:: Nature Nanotechnology, Journal Name: Nature Nanotechnology Journal Issue: 5 Vol. 18; ISSN 1748-3387

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

References (30)

Probing the Spin-Polarized Electronic Band Structure in Monolayer Transition Metal Dichalcogenides by Optical Spectroscopy Wang, Zefang; Zhao, Liang; Mak, Kin Fai Nano Letters, Vol. 17, Issue 2 https://doi.org/10.1021/acs.nanolett.6b03855	journal	January 2017
Unconventional superconductivity in magic-angle graphene superlattices Cao, Yuan; Fatemi, Valla; Fang, Shiang Nature, Vol. 556, Issue 7699 https://doi.org/10.1038/nature26160	journal	March 2018
Spin–valley locking in the normal state of a transition-metal dichalcogenide superconductor Bawden, L.; Cooil, S. P.; Mazzola, F. Nature Communications, Vol. 7, Issue 1 https://doi.org/10.1038/ncomms11711	journal	May 2016
Coulomb engineering of the bandgap and excitons in two-dimensional materials Raja, Archana; Chaves, Andrey; Yu, Jaeeun Nature Communications, Vol. 8, Issue 1 https://doi.org/10.1038/ncomms15251	journal	May 2017
Valley-selective circular dichroism of monolayer molybdenum disulphide Cao, Ting; Wang, Gang; Han, Wenpeng Nature Communications, Vol. 3, Issue 1 https://doi.org/10.1038/ncomms1882	journal	January 2012
Magnetoelectric effects and valley-controlled spin quantum gates in transition metal dichalcogenide bilayers Gong, Zhirui; Liu, Gui-Bin; Yu, Hongyi Nature Communications, Vol. 4, Issue 1 https://doi.org/10.1038/ncomms3053	journal	June 2013
Valley polarization in MoS2 monolayers by optical pumping Zeng, Hualing; Dai, Junfeng; Yao, Wang Nature Nanotechnology, Vol. 7, Issue 8 https://doi.org/10.1038/nnano.2012.95	journal	June 2012
Control of valley polarization in monolayer MoS2 by optical helicity Mak, Kin Fai; He, Keliang; Shan, Jie Nature Nanotechnology, Vol. 7, Issue 8 https://doi.org/10.1038/nnano.2012.96	journal	June 2012
Electrical tuning of valley magnetic moment through symmetry control in bilayer MoS2 Wu, Sanfeng; Ross, Jason S.; Liu, Gui-Bin Nature Physics, Vol. 9, Issue 3 https://doi.org/10.1038/nphys2524	journal	January 2013
Spin–layer locking effects in optical orientation of exciton spin in bilayer WSe2 Jones, Aaron M.; Yu, Hongyi; Ross, Jason S. Nature Physics, Vol. 10, Issue 2 https://doi.org/10.1038/nphys2848	journal	January 2014
Charge-polarized interfacial superlattices in marginally twisted hexagonal boron nitride Woods, C. R.; Ares, P.; Nevison-Andrews, H. Nature Communications, Vol. 12, Issue 1 https://doi.org/10.1038/s41467-020-20667-2	journal	January 2021
Ultrafast pseudospin quantum beats in multilayer WSe2 and MoSe2 Raiber, Simon; Faria Junior, Paulo E.; Falter, Dennis Nature Communications, Vol. 13, Issue 1 https://doi.org/10.1038/s41467-022-32534-3	journal	August 2022
Atomic and electronic reconstruction at the van der Waals interface in twisted bilayer graphene Yoo, Hyobin; Engelke, Rebecca; Carr, Stephen Nature Materials, Vol. 18, Issue 5 https://doi.org/10.1038/s41563-019-0346-z	journal	April 2019
Switching 2D magnetic states via pressure tuning of layer stacking Song, Tiancheng; Fei, Zaiyao; Yankowitz, Matthew Nature Materials, Vol. 18, Issue 12 https://doi.org/10.1038/s41563-019-0505-2	journal	October 2019
Pressure-controlled interlayer magnetism in atomically thin CrI3 Li, Tingxin; Jiang, Shengwei; Sivadas, Nikhil Nature Materials, Vol. 18, Issue 12 https://doi.org/10.1038/s41563-019-0506-1	journal	October 2019
Visualization of moiré superlattices McGilly, Leo J.; Kerelsky, Alexander; Finney, Nathan R. Nature Nanotechnology, Vol. 15, Issue 7 https://doi.org/10.1038/s41565-020-0708-3	journal	June 2020
Bilayer WSe2 as a natural platform for interlayer exciton condensates in the strong coupling limit Shi, Qianhui; Shih, En-Min; Rhodes, Daniel Nature Nanotechnology, Vol. 17, Issue 6 https://doi.org/10.1038/s41565-022-01104-5	journal	April 2022
Strongly correlated electrons and hybrid excitons in a moiré heterostructure Shimazaki, Yuya; Schwartz, Ido; Watanabe, Kenji Nature, Vol. 580, Issue 7804 https://doi.org/10.1038/s41586-020-2191-2	journal	April 2020
Valley-contrasting optics of interlayer excitons in Mo- and W-based bulk transition metal dichalcogenides Arora, Ashish; Deilmann, Thorsten; Marauhn, Philipp Nanoscale, Vol. 10, Issue 33 https://doi.org/10.1039/C8NR03764G	journal	January 2018
Moire bands in twisted double-layer graphene Bistritzer, R.; MacDonald, A. H. Proceedings of the National Academy of Sciences, Vol. 108, Issue 30 https://doi.org/10.1073/pnas.1108174108	journal	July 2011
Fine structure of K-excitons in multilayers of transition metal dichalcogenides Slobodeniuk, A. O.; Bala, Ł; Koperski, M. 2D Materials, Vol. 6, Issue 2 https://doi.org/10.1088/2053-1583/ab0776	journal	February 2019
Exciton-polaritons in multilayer WSe ₂ in a planar microcavity Król, Mateusz; Rechcińska, Katarzyna; Nogajewski, Karol 2D Materials, Vol. 7, Issue 1 https://doi.org/10.1088/2053-1583/ab4b14	journal	October 2019
Three-band tight-binding model for monolayers of group-VIB transition metal dichalcogenides Liu, Gui-Bin; Shan, Wen-Yu; Yao, Yugui Physical Review B, Vol. 88, Issue 8 https://doi.org/10.1103/PhysRevB.88.085433	journal	August 2013
Coupled Spin and Valley Physics in Monolayers of MoS 2 and Other Group-VI Dichalcogenides Xiao, Di; Liu, Gui-Bin; Feng, Wanxiang Physical Review Letters, Vol. 108, Issue 19 https://doi.org/10.1103/PhysRevLett.108.196802	journal	May 2012
Local Spectroscopic Characterization of Spin and Layer Polarization in WSe 2 Yankowitz, Matthew; McKenzie, Devin; LeRoy, Brian J. Physical Review Letters, Vol. 115, Issue 13 https://doi.org/10.1103/PhysRevLett.115.136803	journal	September 2015
Density-Dependent Quantum Hall States and Zeeman Splitting in Monolayer and Bilayer WSe 2 Movva, Hema C. P.; Fallahazad, Babak; Kim, Kyounghwan Physical Review Letters, Vol. 118, Issue 24 https://doi.org/10.1103/PhysRevLett.118.247701	journal	June 2017
Interlayer couplings, Moiré patterns, and 2D electronic superlattices in MoS ₂ /WSe ₂ hetero-bilayers Zhang, Chendong; Chuu, Chih-Piao; Ren, Xibiao Science Advances, Vol. 3, Issue 1 https://doi.org/10.1126/sciadv.1601459	journal	January 2017
Determination of band offsets, hybridization, and exciton binding in 2D semiconductor heterostructures Wilson, Neil R.; Nguyen, Paul V.; Seyler, Kyle Science Advances, Vol. 3, Issue 2 https://doi.org/10.1126/sciadv.1601832	journal	February 2017
Stacking-engineered ferroelectricity in bilayer boron nitride Yasuda, Kenji; Wang, Xirui; Watanabe, Kenji Science, Vol. 372, Issue 6549 https://doi.org/10.1126/science.abd3230	journal	May 2021
Interfacial ferroelectricity by van der Waals sliding Vizner Stern, M.; Waschitz, Y.; Cao, W. Science, Vol. 372, Issue 6549 https://doi.org/10.1126/science.abe8177	journal	June 2021

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