Electronic Janus lattice and kagome-like bands in coloring-triangular MoTe2 monolayers
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2023
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866916265380020224 |
|---|---|
| author | Lei, Le Dai, Jiaqi Dong, Haoyu Geng, Yanyan Cao, Feiyue Wang, Cong Xu, Rui Pang, Fei Li, Fangsen Cheng, Zhihai Wang, Guang Ji, Wei |
| author_facet | Lei, Le Dai, Jiaqi Dong, Haoyu Geng, Yanyan Cao, Feiyue Wang, Cong Xu, Rui Pang, Fei Li, Fangsen Cheng, Zhihai Wang, Guang Ji, Wei |
| contents | 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 achieve 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 in 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 pseudo-Te 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, in one of which the electronic-Janus-lattice feature maintains, implying potential applications as an energy-tunable electron-tunneling barrier in future functional devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2302_06166 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Electronic Janus lattice and kagome-like bands in coloring-triangular MoTe2 monolayers Lei, Le Dai, Jiaqi Dong, Haoyu Geng, Yanyan Cao, Feiyue Wang, Cong Xu, Rui Pang, Fei Li, Fangsen Cheng, Zhihai Wang, Guang Ji, Wei Materials Science 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 achieve 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 in 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 pseudo-Te 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, in one of which the electronic-Janus-lattice feature maintains, implying potential applications as an energy-tunable electron-tunneling barrier in future functional devices. |
| title | Electronic Janus lattice and kagome-like bands in coloring-triangular MoTe2 monolayers |
| topic | Materials Science |
| url | https://arxiv.org/abs/2302.06166 |