Topological Flat Bands in 2D Breathing-Kagome Lattice Nb3 TeCl7
© 2023 Wiley-VCH GmbH..
Flat bands (FBs) can appear in two-dimensional (2D) geometrically frustrated systems caused by quantum destructive interference (QDI). However, the scarcity of pure 2D frustrated crystal structures in natural materials makes FBs hard to be identified, let alone modulate FBs relating to electronic properties. Here, the experimental evidence of the complete electronic QDI induced FB contributed by the 2D breathing-kagome layers of Nb atoms in Nb3 TeCl7 (NTC) is reported. An identical chemical state and 2D localization characteristics of the Nb breathing-kagome layers are experimentally confirmed, based on which NTC is demonstrated to be a superior concrete candidate for the breathing-kagome tight-binding model. Furthermore, it theoretically establishes the tunable roles of the on-site energy over Nb sites on bandwidth, energy position, and topology of FBs in NTC. This work opens an aveanue to manipulate FB characteristics in these 4d transition-metal-based breathing-kagome materials.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:35 |
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| Enthalten in: |
Advanced materials (Deerfield Beach, Fla.) - 35(2023), 41 vom: 01. Okt., Seite e2301790 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Zhang, Hongrun [VerfasserIn] |
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| Links: |
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| Themen: |
Angle-resolved photoemission spectroscopy |
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| Anmerkungen: |
Date Revised 20.10.2023 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1002/adma.202301790 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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NLM359978886 |
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| 520 | |a © 2023 Wiley-VCH GmbH. | ||
| 520 | |a Flat bands (FBs) can appear in two-dimensional (2D) geometrically frustrated systems caused by quantum destructive interference (QDI). However, the scarcity of pure 2D frustrated crystal structures in natural materials makes FBs hard to be identified, let alone modulate FBs relating to electronic properties. Here, the experimental evidence of the complete electronic QDI induced FB contributed by the 2D breathing-kagome layers of Nb atoms in Nb3 TeCl7 (NTC) is reported. An identical chemical state and 2D localization characteristics of the Nb breathing-kagome layers are experimentally confirmed, based on which NTC is demonstrated to be a superior concrete candidate for the breathing-kagome tight-binding model. Furthermore, it theoretically establishes the tunable roles of the on-site energy over Nb sites on bandwidth, energy position, and topology of FBs in NTC. This work opens an aveanue to manipulate FB characteristics in these 4d transition-metal-based breathing-kagome materials | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Nb3TeCl7 | |
| 650 | 4 | |a angle-resolved photoemission spectroscopy | |
| 650 | 4 | |a breathing kagome | |
| 650 | 4 | |a flat band | |
| 650 | 4 | |a topological | |
| 700 | 1 | |a Shi, Zhijian |e verfasserin |4 aut | |
| 700 | 1 | |a Jiang, Zhicheng |e verfasserin |4 aut | |
| 700 | 1 | |a Yang, Ming |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Jingwei |e verfasserin |4 aut | |
| 700 | 1 | |a Meng, Ziyuan |e verfasserin |4 aut | |
| 700 | 1 | |a Hu, Tonghua |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Fucai |e verfasserin |4 aut | |
| 700 | 1 | |a Cheng, Long |e verfasserin |4 aut | |
| 700 | 1 | |a Xie, Yong |e verfasserin |4 aut | |
| 700 | 1 | |a Zhuang, Jincheng |e verfasserin |4 aut | |
| 700 | 1 | |a Feng, Haifeng |e verfasserin |4 aut | |
| 700 | 1 | |a Hao, Weichang |e verfasserin |4 aut | |
| 700 | 1 | |a Shen, Dawei |e verfasserin |4 aut | |
| 700 | 1 | |a Du, Yi |e verfasserin |4 aut | |
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