# Observation of Integer and Fractional Quantum Anomalous Hall Effects in Twisted Bilayer MoTe 2 https://mdr.nims.go.jp/datasets/06995186-986a-4d72-9f35-d92cc936d16a ## File - [PhysRevX.13.031037.pdf](https://mdr.nims.go.jp/filesets/94c6a00e-9ec2-4125-ad99-03d167650a08/download) ([Detail](https://mdr.nims.go.jp/filesets/94c6a00e-9ec2-4125-ad99-03d167650a08.md)) ## Id 06995186-986a-4d72-9f35-d92cc936d16a ## Local identifier ## Visibility open_to_public ## State published ## Created at 2025-02-27T07:20:30.998613Z ## Updated at 2025-02-28T07:30:30.968586Z ## Published at 2025-02-28T07:30:31.060477Z ## Doi ## First published url https://doi.org/10.1103/physrevx.13.031037 ## Date published 2023-09-27 ## Recorded date published 2023-9 ## Resource type journal_article ## Manuscript type vor ## Collection ## Title - title: Observation of Integer and Fractional Quantum Anomalous Hall Effects in Twisted Bilayer MoTe2 title_type: original lang: en ## Description - description: The interplay between strong correlations and topology can lead to the emergence of intriguing quantum states of matter. One well-known example is the factional quantum Hall effect, where exotic electron fluids with fractional charge excitations form in partially filled landau levels. The emergence of topological moiré flat bands provides exciting opportunities to realize the lattice analogs of both the integer and fractional quantum Hall states without the need for an external magnetic field. These states are known as the integer and fractional quantum anomalous Hall (IQAH and FQAH) states. Here, we present direct transport evidence of the existence of both IQAH and FQAH states in twisted bilayer MoTe2 (AA stacked). At zero magnetic field, we observe well-quantized Hall resistance of h/e2 around moiré filling factor ν = -1 (corresponding to one hole per moiré unit cell), and nearly-quantized Hall resistance of 3h/2e2 around ν = -2/3, respectively. Concomitantly, the longitudinal resistance exhibits distinct minima around ν = -1 and -2/3. The application of an electric field induces topological quantum phase transition from the IQAH state to a charge transfer insulator at ν = -1, and from the FQAH state to a generalized Wigner crystal state, further transitioning to a metallic state at ν = -2/3. Our study paves the way for the investigation of fractional charge excitations and anyon statistics at zero magnetic field based on semiconductor moiré materials. description_type: abstract lang: und ## Creator - name: Fan Xu role: author - name: Zheng Sun role: author - name: Tongtong Jia role: author - name: Chang Liu role: author - name: Cheng Xu role: author - name: Chushan Li role: author - name: Yu Gu role: author - name: Kenji Watanabe role: author orcid: https://orcid.org/0000-0003-3701-8119 organization: National Institute for Materials Science ror: https://ror.org/026v1ze26 - name: Takashi Taniguchi role: author orcid: https://orcid.org/0000-0002-1467-3105 organization: National Institute for Materials Science ror: https://ror.org/026v1ze26 - name: Bingbing Tong role: author - name: Jinfeng Jia role: author - name: Zhiwen Shi role: author - name: Shengwei Jiang role: author - name: Yang Zhang role: author - name: Xiaoxue Liu role: author - name: Tingxin Li role: author ## Contact agent ## Publisher organization: American Physical Society (APS) ## Managing organization ## Keyword - subject: Fractional quantum Hall effect schema: not_defined - subject: topological moiré flat bands schema: not_defined - subject: MoTe2 schema: not_defined ## Rights - identifier: https://creativecommons.org/licenses/by/4.0/ ## Other identifier(s) ## Data origin - data_origin_type: other ## Embargo ## Journal - title: Physical Review X issn: '21603308' volume: '13' issue: '3' article_number: '031037' ## Conference ## Related item ## Funding - identifier: 2022YFA1405400 funder_name: National Key Research and Development Program of China - identifier: 2022YFA1402702 funder_name: National Key Research and Development Program of China - identifier: 2022YFA1402404 funder_name: National Key Research and Development Program of China - identifier: 2021YFA1401400 funder_name: National Key Research and Development Program of China - identifier: '12141404' funder_name: National Natural Science Foundation of China - identifier: '12074244' funder_name: National Natural Science Foundation of China - identifier: 22ZR1430900 funder_name: Natural Science Foundation of Shanghai - funder_name: Shanghai Jiao Tong University - funder_name: University of Tennessee - identifier: DMR-2309083 funder_name: National Science Foundation - identifier: 21H05233 funder_name: Japan Society for the Promotion of Science - identifier: 23H02052 funder_name: Japan Society for the Promotion of Science - identifier: 2021ZD0302600 funder_name: Innovation Program for Quantum Science and Technology - identifier: 2021ZD0302500 funder_name: Innovation Program for Quantum Science and Technology - identifier: 22PJ1406700 funder_name: Pujiang Talent Program - funder_name: World Premier International Research Center Initiative - identifier: 2021YFA1400100 funder_name: National Key Research and Development Program of China - identifier: 2021YFA1202902 funder_name: National Key Research and Development Program of China - identifier: 2019YFA0308600 funder_name: National Key Research and Development Program of China - identifier: '12174249' funder_name: National Natural Science Foundation of China - identifier: '92265102' funder_name: National Natural Science Foundation of China - identifier: '12174250' funder_name: National Natural Science Foundation of China ## Instrument ## Instrument operator ## Instrument managing organization ## Measurement method ## Specimen ## Chemical composition ## Structure for specimen ## Structural feature for specimen ## Specific property for specimen ## Process for specimen treatment ## Computational method ## Energy level/transition state ## Software ## Custom property ## Fileset - id: 94c6a00e-9ec2-4125-ad99-03d167650a08 filename: PhysRevX.13.031037.pdf content_type: application/pdf size: 7789047 md5: c13ec1fb4079006a1cbaa8982757e473 ## Thumbnail fileset_id: 94c6a00e-9ec2-4125-ad99-03d167650a08 filename: PhysRevX.13.031037.pdf