Valley-Coherent Quantum Anomalous Hall State in AB-Stacked MoTe 2 / W S e 2 Bilayers

Tao, Zui; Shen, Bowen; Jiang, Shengwei; Li, Tingxin; Li, Lizhong; Ma, Liguo; Zhao, Wenjin; Hu, Jenny; Pistunova, Kateryna; Watanabe, Kenji; Taniguchi, Takashi; Heinz, Tony F.; Mak, Kin Fai; Shan, Jie

doi:10.1103/PhysRevX.14.011004

Valley-Coherent Quantum Anomalous Hall State in AB-Stacked ${MoTe}_{2} / {W S e}_{2}$ Bilayers

Journal Article · Wed Jan 10 00:00:00 EST 2024 · Physical Review. X

DOI:https://doi.org/10.1103/PhysRevX.14.011004· OSTI ID:2280710

Tao, Zui; Shen, Bowen; Jiang, Shengwei; Li, Tingxin; Li, Lizhong; Ma, Liguo; ; Hu, Jenny; Pistunova, Kateryna; Watanabe, Kenji; Taniguchi, Takashi; Heinz, Tony F.; ; Shan, Jie

Moiré materials provide fertile ground for the correlated and topological quantum phenomena. Among them, the quantum anomalous Hall (QAH) effect, in which the Hall resistance is quantized even under zero magnetic field, is a direct manifestation of the intrinsic topological properties of a material and an appealing attribute for low-power electronics applications. The QAH effect has been observed in both graphene and transition metal dichalcogenide (TMD) moiré materials. It is thought to arise from the interaction-driven valley polarization of the narrow moiré bands. Here, we show that the newly discovered QAH state in AB-stacked ${MoTe}_{2} / {W S e}_{2}$ moiré bilayers is not valley polarized but valley coherent. The layer- and helicity-resolved optical spectroscopy measurement reveals that the QAH ground state possesses spontaneous spin (valley) polarization aligned (antialigned) in two TMD layers. In addition, saturation of the out-of-plane spin polarization in both layers occurs only under high magnetic fields, supporting a canted spin texture. Our results call for a new mechanism for the QAH effect and highlight the potential of TMD moiré materials with strong electronic correlations and spin-orbit interactions for exotic topological states.

Published by the American Physical Society 2024

View Journal Article

Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: Air Force Office of Scientific Research (AFOSR); Gordon and Betty Moore Foundation; National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-76SF00515; SC0019481

OSTI ID:: 2280710

Alternate ID(s):: OSTI ID: 2323395

Journal Information:: Physical Review. X, Journal Name: Physical Review. X Journal Issue: 1 Vol. 14; ISSN PRXHAE; ISSN 2160-3308

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

References (39)

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 and pseudospins in layered transition metal dichalcogenides Xu, Xiaodong; Yao, Wang; Xiao, Di Nature Physics, Vol. 10, Issue 5 https://doi.org/10.1038/nphys2942	journal	April 2014
Fermi polaron-polaritons in charge-tunable atomically thin semiconductors Sidler, Meinrad; Back, Patrick; Cotlet, Ovidiu Nature Physics, Vol. 13, Issue 3 https://doi.org/10.1038/nphys3949	journal	October 2016
Magic in twisted transition metal dichalcogenide bilayers Devakul, Trithep; Crépel, Valentin; Zhang, Yang Nature Communications, Vol. 12, Issue 1 https://doi.org/10.1038/s41467-021-27042-9	journal	November 2021
Graphene bilayers with a twist Andrei, Eva Y.; MacDonald, Allan H. Nature Materials, Vol. 19, Issue 12 https://doi.org/10.1038/s41563-020-00840-0	journal	November 2020
Charge-order-enhanced capacitance in semiconductor moiré superlattices Li, Tingxin; Zhu, Jiacheng; Tang, Yanhao Nature Nanotechnology, Vol. 16, Issue 10 https://doi.org/10.1038/s41565-021-00955-8	journal	August 2021
Semiconductor moiré materials Mak, Kin Fai; Shan, Jie Nature Nanotechnology, Vol. 17, Issue 7 https://doi.org/10.1038/s41565-022-01165-6	journal	July 2022
Light–valley interactions in 2D semiconductors Mak, Kin Fai; Xiao, Di; Shan, Jie Nature Photonics, Vol. 12, Issue 8 https://doi.org/10.1038/s41566-018-0204-6	journal	July 2018
Moiré heterostructures as a condensed-matter quantum simulator Kennes, Dante M.; Claassen, Martin; Xian, Lede Nature Physics, Vol. 17, Issue 2 https://doi.org/10.1038/s41567-020-01154-3	journal	February 2021
Superconductivity and strong correlations in moiré flat bands Balents, Leon; Dean, Cory R.; Efetov, Dmitri K. Nature Physics, Vol. 16, Issue 7 https://doi.org/10.1038/s41567-020-0906-9	journal	May 2020
Topological charge density waves at half-integer filling of a moiré superlattice Polshyn, H.; Zhang, Y.; Kumar, M. A. Nature Physics, Vol. 18, Issue 1 https://doi.org/10.1038/s41567-021-01418-6	journal	December 2021
Observation of moiré excitons in WSe2/WS2 heterostructure superlattices Jin, Chenhao; Regan, Emma C.; Yan, Aiming Nature, Vol. 567, Issue 7746 https://doi.org/10.1038/s41586-019-0976-y	journal	February 2019
Tunable correlated Chern insulator and ferromagnetism in a moiré superlattice Chen, Guorui; Sharpe, Aaron L.; Fox, Eli J. Nature, Vol. 579, Issue 7797 https://doi.org/10.1038/s41586-020-2049-7	journal	March 2020
Simulation of Hubbard model physics in WSe2/WS2 moiré superlattices Tang, Yanhao; Li, Lizhong; Li, Tingxin Nature, Vol. 579, Issue 7799 https://doi.org/10.1038/s41586-020-2085-3	journal	March 2020
Electrical switching of magnetic order in an orbital Chern insulator Polshyn, H.; Zhu, J.; Kumar, M. A. Nature, Vol. 588, Issue 7836 https://doi.org/10.1038/s41586-020-2963-8	journal	November 2020
Continuous Mott transition in semiconductor moiré superlattices Li, Tingxin; Jiang, Shengwei; Li, Lizhong Nature, Vol. 597, Issue 7876 https://doi.org/10.1038/s41586-021-03853-0	journal	September 2021
Quantum anomalous Hall effect from intertwined moiré bands Li, Tingxin; Jiang, Shengwei; Shen, Bowen Nature, Vol. 600, Issue 7890 https://doi.org/10.1038/s41586-021-04171-1	journal	December 2021
Orbital magnetic states in moiré graphene systems Liu, Jianpeng; Dai, Xi Nature Reviews Physics, Vol. 3, Issue 5 https://doi.org/10.1038/s42254-021-00297-3	journal	April 2021
Spin-textured Chern bands in AB-stacked transition metal dichalcogenide bilayers Zhang, Yang; Devakul, Trithep; Fu, Liang Proceedings of the National Academy of Sciences, Vol. 118, Issue 36 https://doi.org/10.1073/pnas.2112673118	journal	September 2021
Quantum anomalous Hall effect and electric-field-induced topological phase transition in AB-stacked MoTe2/WSe2 moiré heterobilayers Chang, Yao-Wen; Chang, Yia-Chung Physical Review B, Vol. 106, Issue 24 https://doi.org/10.1103/PhysRevB.106.245412	journal	December 2022
Excitonic Chern insulator and kinetic ferromagnetism in a MoTe2/WSe2 moiré bilayer Dong, Zhihuan; Zhang, Ya-Hui Physical Review B, Vol. 107, Issue 8 https://doi.org/10.1103/PhysRevB.107.L081101	journal	February 2023
Many-body theory of trion absorption features in two-dimensional semiconductors Efimkin, Dmitry K.; MacDonald, Allan H. Physical Review B, Vol. 95, Issue 3 https://doi.org/10.1103/PhysRevB.95.035417	journal	January 2017
Nearly flat Chern bands in moiré superlattices Zhang, Ya-Hui; Mao, Dan; Cao, Yuan Physical Review B, Vol. 99, Issue 7 https://doi.org/10.1103/PhysRevB.99.075127	journal	February 2019
Scale-Invariant Quantum Anomalous Hall Effect in Magnetic Topological Insulators beyond the Two-Dimensional Limit Kou, Xufeng; Guo, Shih-Ting; Fan, Yabin Physical Review Letters, Vol. 113, Issue 13 https://doi.org/10.1103/PhysRevLett.113.137201	journal	September 2014
Topological Insulators in Twisted Transition Metal Dichalcogenide Homobilayers Wu, Fengcheng; Lovorn, Timothy; Tutuc, Emanuel Physical Review Letters, Vol. 122, Issue 8 https://doi.org/10.1103/PhysRevLett.122.086402	journal	February 2019
Collective Excitations of Quantum Anomalous Hall Ferromagnets in Twisted Bilayer Graphene Wu, Fengcheng; Das Sarma, Sankar Physical Review Letters, Vol. 124, Issue 4 https://doi.org/10.1103/PhysRevLett.124.046403	journal	January 2020
Mechanism for Anomalous Hall Ferromagnetism in Twisted Bilayer Graphene Bultinck, Nick; Chatterjee, Shubhayu; Zaletel, Michael P. Physical Review Letters, Vol. 124, Issue 16 https://doi.org/10.1103/PhysRevLett.124.166601	journal	April 2020
Ferromagnetism in Narrow Bands of Moiré Superlattices Repellin, Cécile; Dong, Zhihuan; Zhang, Ya-Hui Physical Review Letters, Vol. 124, Issue 18 https://doi.org/10.1103/PhysRevLett.124.187601	journal	May 2020
Valley-Polarized Quantum Anomalous Hall State in Moiré MoTe 2 / WSe 2 Heterobilayers Xie, Ying-Ming; Zhang, Cheng-Ping; Hu, Jin-Xin Physical Review Letters, Vol. 128, Issue 2 https://doi.org/10.1103/PhysRevLett.128.026402	journal	January 2022
Topological Phases in AB-Stacked MoTe2/WSe2 : Z2 Topological Insulators, Chern Insulators, and Topological Charge Density Waves Pan, Haining; Xie, Ming; Wu, Fengcheng Physical Review Letters, Vol. 129, Issue 5 https://doi.org/10.1103/PhysRevLett.129.056804	journal	July 2022
Nematic Excitonic Insulator in Transition Metal Dichalcogenide Moiré Heterobilayers Xie, Ming; Pan, Haining; Wu, Fengcheng Physical Review Letters, Vol. 131, Issue 4 https://doi.org/10.1103/PhysRevLett.131.046402	journal	July 2023
Massive Dirac fermions in moiré superlattices: A route towards topological flat minibands and correlated topological insulators Su, Ying; Li, Heqiu; Zhang, Chuanwei Physical Review Research, Vol. 4, Issue 3 https://doi.org/10.1103/PhysRevResearch.4.L032024	journal	August 2022
Observation of Quantized Exciton Energies in Monolayer WSe 2 under a Strong Magnetic Field Wang, Tianmeng; Li, Zhipeng; Lu, Zhengguang Physical Review X, Vol. 10, Issue 2 https://doi.org/10.1103/PhysRevX.10.021024	journal	April 2020
Quantum Anomalous Hall Effect from Inverted Charge Transfer Gap Devakul, Trithep; Fu, Liang Physical Review X, Vol. 12, Issue 2 https://doi.org/10.1103/PhysRevX.12.021031	journal	May 2022
Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator Chang, C. -Z.; Zhang, J.; Feng, X. Science, Vol. 340, Issue 6129 https://doi.org/10.1126/science.1234414	journal	March 2013
Emergent ferromagnetism near three-quarters filling in twisted bilayer graphene Sharpe, Aaron L.; Fox, Eli J.; Barnard, Arthur W. Science, Vol. 365, Issue 6453 https://doi.org/10.1126/science.aaw3780	journal	July 2019
Intrinsic quantized anomalous Hall effect in a moiré heterostructure Serlin, M.; Tschirhart, C. L.; Polshyn, H. Science, Vol. 367, Issue 6480 https://doi.org/10.1126/science.aay5533	journal	December 2019
Correlated Quantum Phenomena in the Strong Spin-Orbit Regime Witczak-Krempa, William; Chen, Gang; Kim, Yong Baek Annual Review of Condensed Matter Physics, Vol. 5, Issue 1 https://doi.org/10.1146/annurev-conmatphys-020911-125138	journal	March 2014
The Quantum Anomalous Hall Effect: Theory and Experiment Liu, Chao-Xing; Zhang, Shou-Cheng; Qi, Xiao-Liang Annual Review of Condensed Matter Physics, Vol. 7, Issue 1 https://doi.org/10.1146/annurev-conmatphys-031115-011417	journal	March 2016

Similar Records

Ferri-ionic coupling in

{Cu In P}_{2} S_{6}

nanoflakes: Polarization states and controllable negative capacitance

Journal Article · Tue Sep 24 20:00:00 EDT 2024 · Physical Review Applied · OSTI ID:2473493

Random singlet-like state in the dimer-based triangular antiferromagnet

{Ba}_{6} Y_{2} {Rh}_{2} {Ti}_{2} O_{17 - δ}

Journal Article · Sun Jun 02 20:00:00 EDT 2024 · Physical Review Research · OSTI ID:2369753

Pressure-Induced Superconductivity In Polycrystalline

{La}_{3} {Ni}_{2} O_{7 - δ}

Journal Article · Wed Mar 06 19:00:00 EST 2024 · Physical Review. X · OSTI ID:2320288

Related Subjects

2-dimensional systems
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
excitons
magnetic order
magnetism
magneto-optics
topological materials
topological phases of matter
transition metal dichalcogenides
transport phenomena
valley degrees of freedom

Valley-Coherent Quantum Anomalous Hall State in AB-Stacked MoTe 2 / W S e 2 Bilayers

Citation Formats

References (39)

Similar Records

Related Subjects

Valley-Coherent Quantum Anomalous Hall State in AB-Stacked ${MoTe}_{2} / {W S e}_{2}$ Bilayers