Observation of Γ-Valley Moiré Bands and Emergent Hexagonal Lattice in Twisted Transition Metal Dichalcogenides
Twisted van der Waals heterostructures have recently been proposed as a condensed-matter platform for realizing controllable quantum models due to the low-energy moiré bands with specific charge distributions moiré superlattices. Here, combining angle-resolved photoemission spectroscopy with submicr...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2022-06-01
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| Series: | Physical Review X |
| Online Access: | http://doi.org/10.1103/PhysRevX.12.021065 |
| _version_ | 1828833444740726784 |
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| author | Ding Pei Binbin Wang Zishu Zhou Zhihai He Liheng An Shanmei He Cheng Chen Yiwei Li Liyang Wei Aiji Liang Jose Avila Pavel Dudin Viktor Kandyba Alessio Giampietri Mattia Cattelan Alexei Barinov Zhongkai Liu Jianpeng Liu Hongming Weng Ning Wang Jiamin Xue Yulin Chen |
| author_facet | Ding Pei Binbin Wang Zishu Zhou Zhihai He Liheng An Shanmei He Cheng Chen Yiwei Li Liyang Wei Aiji Liang Jose Avila Pavel Dudin Viktor Kandyba Alessio Giampietri Mattia Cattelan Alexei Barinov Zhongkai Liu Jianpeng Liu Hongming Weng Ning Wang Jiamin Xue Yulin Chen |
| author_sort | Ding Pei |
| collection | DOAJ |
| description | Twisted van der Waals heterostructures have recently been proposed as a condensed-matter platform for realizing controllable quantum models due to the low-energy moiré bands with specific charge distributions moiré superlattices. Here, combining angle-resolved photoemission spectroscopy with submicron spatial resolution (μ-ARPES) and scanning tunneling microscopy (STM), we performed a systematic investigation on the electronic structure of 5.1° twisted bilayer WSe_{2} that hosts correlated insulating and zero-resistance states. Interestingly, contrary to one’s expectation, moiré bands were observed only at Γ valley but not K valley in μ-ARPES measurements, and correspondingly, our STM measurements clearly identified the real-space honeycomb- and kagome-shaped charge distributions at the moiré length scale associated with the Γ-valley moiré bands. These results not only reveal the unusual valley-dependent moiré-modified electronic structure in twisted transition metal dichalcogenides, but also highlight the Γ-valley moiré bands as a promising platform for exploring strongly correlated physics in emergent honeycomb and kagome lattices at different energy scales. |
| first_indexed | 2024-12-12T17:19:34Z |
| format | Article |
| id | doaj.art-d62515febf7a46ce934bc3cd3f7bcf38 |
| institution | Directory Open Access Journal |
| issn | 2160-3308 |
| language | English |
| last_indexed | 2024-12-12T17:19:34Z |
| publishDate | 2022-06-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review X |
| spelling | doaj.art-d62515febf7a46ce934bc3cd3f7bcf382022-12-22T00:17:42ZengAmerican Physical SocietyPhysical Review X2160-33082022-06-0112202106510.1103/PhysRevX.12.021065Observation of Γ-Valley Moiré Bands and Emergent Hexagonal Lattice in Twisted Transition Metal DichalcogenidesDing PeiBinbin WangZishu ZhouZhihai HeLiheng AnShanmei HeCheng ChenYiwei LiLiyang WeiAiji LiangJose AvilaPavel DudinViktor KandybaAlessio GiampietriMattia CattelanAlexei BarinovZhongkai LiuJianpeng LiuHongming WengNing WangJiamin XueYulin ChenTwisted van der Waals heterostructures have recently been proposed as a condensed-matter platform for realizing controllable quantum models due to the low-energy moiré bands with specific charge distributions moiré superlattices. Here, combining angle-resolved photoemission spectroscopy with submicron spatial resolution (μ-ARPES) and scanning tunneling microscopy (STM), we performed a systematic investigation on the electronic structure of 5.1° twisted bilayer WSe_{2} that hosts correlated insulating and zero-resistance states. Interestingly, contrary to one’s expectation, moiré bands were observed only at Γ valley but not K valley in μ-ARPES measurements, and correspondingly, our STM measurements clearly identified the real-space honeycomb- and kagome-shaped charge distributions at the moiré length scale associated with the Γ-valley moiré bands. These results not only reveal the unusual valley-dependent moiré-modified electronic structure in twisted transition metal dichalcogenides, but also highlight the Γ-valley moiré bands as a promising platform for exploring strongly correlated physics in emergent honeycomb and kagome lattices at different energy scales.http://doi.org/10.1103/PhysRevX.12.021065 |
| spellingShingle | Ding Pei Binbin Wang Zishu Zhou Zhihai He Liheng An Shanmei He Cheng Chen Yiwei Li Liyang Wei Aiji Liang Jose Avila Pavel Dudin Viktor Kandyba Alessio Giampietri Mattia Cattelan Alexei Barinov Zhongkai Liu Jianpeng Liu Hongming Weng Ning Wang Jiamin Xue Yulin Chen Observation of Γ-Valley Moiré Bands and Emergent Hexagonal Lattice in Twisted Transition Metal Dichalcogenides Physical Review X |
| title | Observation of Γ-Valley Moiré Bands and Emergent Hexagonal Lattice in Twisted Transition Metal Dichalcogenides |
| title_full | Observation of Γ-Valley Moiré Bands and Emergent Hexagonal Lattice in Twisted Transition Metal Dichalcogenides |
| title_fullStr | Observation of Γ-Valley Moiré Bands and Emergent Hexagonal Lattice in Twisted Transition Metal Dichalcogenides |
| title_full_unstemmed | Observation of Γ-Valley Moiré Bands and Emergent Hexagonal Lattice in Twisted Transition Metal Dichalcogenides |
| title_short | Observation of Γ-Valley Moiré Bands and Emergent Hexagonal Lattice in Twisted Transition Metal Dichalcogenides |
| title_sort | observation of γ valley moire bands and emergent hexagonal lattice in twisted transition metal dichalcogenides |
| url | http://doi.org/10.1103/PhysRevX.12.021065 |
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