Electronic Janus lattice and kagome-like bands in coloring-triangular MoTe2 monolayers
Abstract Polymorphic structures of transition metal dichalcogenides (TMDs) host exotic electronic states, like charge density wave and superconductivity. However, the number of these structures is limited by crystal symmetries, which poses a challenge to achieving tailored lattices and properties bo...
| Published in: | Nature Communications |
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Nature Portfolio
2023-10-01
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| Online Access: | https://doi.org/10.1038/s41467-023-42044-5 |
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| author | Le Lei Jiaqi Dai Haoyu Dong Yanyan Geng Feiyue Cao Cong Wang Rui Xu Fei Pang Zheng-Xin Liu Fangsen Li Zhihai Cheng Guang Wang Wei Ji |
| author_facet | Le Lei Jiaqi Dai Haoyu Dong Yanyan Geng Feiyue Cao Cong Wang Rui Xu Fei Pang Zheng-Xin Liu Fangsen Li Zhihai Cheng Guang Wang Wei Ji |
| author_sort | Le Lei |
| collection | DOAJ |
| container_title | Nature Communications |
| description | Abstract Polymorphic structures of transition metal dichalcogenides (TMDs) host exotic electronic states, like charge density wave and superconductivity. However, the number of these structures is limited by crystal symmetries, which poses a challenge to achieving tailored lattices and properties both theoretically and experimentally. Here, we report a coloring-triangle (CT) latticed MoTe2 monolayer, termed CT-MoTe2, constructed by controllably introducing uniform and ordered mirror-twin-boundaries into a pristine monolayer via molecular beam epitaxy. Low-temperature scanning tunneling microscopy and spectroscopy (STM/STS) together with theoretical calculations reveal that the monolayer has an electronic Janus lattice, i.e., an energy-dependent atomic-lattice and a Te pseudo-sublattice, and shares the identical geometry with the Mo5Te8 layer. Dirac-like and flat electronic bands inherently existing in the CT lattice are identified by two broad and two prominent peaks in STS spectra, respectively, and verified with density-functional-theory calculations. Two types of intrinsic domain boundaries were observed, one of which maintains the electronic-Janus-lattice feature, implying potential applications as an energy-tunable electron-tunneling barrier in future functional devices. |
| format | Article |
| id | doaj-art-5d3039b4b5fa42a498c8eb726cfdbd71 |
| institution | Directory of Open Access Journals |
| issn | 2041-1723 |
| language | English |
| publishDate | 2023-10-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| spelling | doaj-art-5d3039b4b5fa42a498c8eb726cfdbd712025-08-19T22:50:28ZengNature PortfolioNature Communications2041-17232023-10-011411910.1038/s41467-023-42044-5Electronic Janus lattice and kagome-like bands in coloring-triangular MoTe2 monolayersLe Lei0Jiaqi Dai1Haoyu Dong2Yanyan Geng3Feiyue Cao4Cong Wang5Rui Xu6Fei Pang7Zheng-Xin Liu8Fangsen Li9Zhihai Cheng10Guang Wang11Wei Ji12Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Department of Physics, Renmin University of ChinaBeijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Department of Physics, Renmin University of ChinaBeijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Department of Physics, Renmin University of ChinaBeijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Department of Physics, Renmin University of ChinaBeijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Department of Physics, Renmin University of ChinaBeijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Department of Physics, Renmin University of ChinaBeijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Department of Physics, Renmin University of ChinaBeijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Department of Physics, Renmin University of ChinaBeijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Department of Physics, Renmin University of ChinaVacuum Interconnected Nanotech Workstation, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of SciencesBeijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Department of Physics, Renmin University of ChinaDepartment of Physics, College of Sciences, National University of Defense TechnologyBeijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Department of Physics, Renmin University of ChinaAbstract Polymorphic structures of transition metal dichalcogenides (TMDs) host exotic electronic states, like charge density wave and superconductivity. However, the number of these structures is limited by crystal symmetries, which poses a challenge to achieving tailored lattices and properties both theoretically and experimentally. Here, we report a coloring-triangle (CT) latticed MoTe2 monolayer, termed CT-MoTe2, constructed by controllably introducing uniform and ordered mirror-twin-boundaries into a pristine monolayer via molecular beam epitaxy. Low-temperature scanning tunneling microscopy and spectroscopy (STM/STS) together with theoretical calculations reveal that the monolayer has an electronic Janus lattice, i.e., an energy-dependent atomic-lattice and a Te pseudo-sublattice, and shares the identical geometry with the Mo5Te8 layer. Dirac-like and flat electronic bands inherently existing in the CT lattice are identified by two broad and two prominent peaks in STS spectra, respectively, and verified with density-functional-theory calculations. Two types of intrinsic domain boundaries were observed, one of which maintains the electronic-Janus-lattice feature, implying potential applications as an energy-tunable electron-tunneling barrier in future functional devices.https://doi.org/10.1038/s41467-023-42044-5 |
| spellingShingle | Le Lei Jiaqi Dai Haoyu Dong Yanyan Geng Feiyue Cao Cong Wang Rui Xu Fei Pang Zheng-Xin Liu Fangsen Li Zhihai Cheng Guang Wang Wei Ji Electronic Janus lattice and kagome-like bands in coloring-triangular MoTe2 monolayers |
| title | Electronic Janus lattice and kagome-like bands in coloring-triangular MoTe2 monolayers |
| title_full | Electronic Janus lattice and kagome-like bands in coloring-triangular MoTe2 monolayers |
| title_fullStr | Electronic Janus lattice and kagome-like bands in coloring-triangular MoTe2 monolayers |
| title_full_unstemmed | Electronic Janus lattice and kagome-like bands in coloring-triangular MoTe2 monolayers |
| title_short | Electronic Janus lattice and kagome-like bands in coloring-triangular MoTe2 monolayers |
| title_sort | electronic janus lattice and kagome like bands in coloring triangular mote2 monolayers |
| url | https://doi.org/10.1038/s41467-023-42044-5 |
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