Tuning the Flat Band in Bi2O2Se by Pressure to Induce Superconductivity
The discovery of superconductivity in twisted bilayer graphene has reignited enthusiasm in the field of flat-band superconductivity. However, important challenges remain, such as constructing a flat-band structure and inducing a superconducting state in materials. Here, we successfully achieved superconductivity in Bi2O2Se by pressure-tuning the flat-band electronic structure. Experimental measurements combined with theoretical calculations reveal that the occurrence of pressure-induced superconductivity at 30 GPa is associated with a flat-band electronic structure near the Fermi level. Moreover, in Bi2O2Se, a van Hove singularity is observed at the Fermi level alongside pronounced Fermi surface nesting. These remarkable features play a crucial role in promoting strong electron-phonon interactions, thus potentially enhancing the superconducting properties of the material. These findings demonstrate that pressure offers a potential experimental strategy for precisely tuning the flat band and achieving superconductivity.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:146 |
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| Enthalten in: |
Journal of the American Chemical Society - 146(2024), 11 vom: 20. März, Seite 7324-7331 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Tian, Hui [VerfasserIn] |
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| Anmerkungen: |
Date Revised 20.03.2024 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1021/jacs.3c11984 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM369352920 |
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| 520 | |a The discovery of superconductivity in twisted bilayer graphene has reignited enthusiasm in the field of flat-band superconductivity. However, important challenges remain, such as constructing a flat-band structure and inducing a superconducting state in materials. Here, we successfully achieved superconductivity in Bi2O2Se by pressure-tuning the flat-band electronic structure. Experimental measurements combined with theoretical calculations reveal that the occurrence of pressure-induced superconductivity at 30 GPa is associated with a flat-band electronic structure near the Fermi level. Moreover, in Bi2O2Se, a van Hove singularity is observed at the Fermi level alongside pronounced Fermi surface nesting. These remarkable features play a crucial role in promoting strong electron-phonon interactions, thus potentially enhancing the superconducting properties of the material. These findings demonstrate that pressure offers a potential experimental strategy for precisely tuning the flat band and achieving superconductivity | ||
| 650 | 4 | |a Journal Article | |
| 700 | 1 | |a Tu, Teng |e verfasserin |4 aut | |
| 700 | 1 | |a Jin, Xilian |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Chenyi |e verfasserin |4 aut | |
| 700 | 1 | |a Lin, Tao |e verfasserin |4 aut | |
| 700 | 1 | |a Dong, Qing |e verfasserin |4 aut | |
| 700 | 1 | |a Jing, Xiaoling |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Bo |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Ran |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Da |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Zhongkai |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Quanjun |e verfasserin |4 aut | |
| 700 | 1 | |a Peng, Hailin |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Bingbing |e verfasserin |4 aut | |
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