Guardado en:
| Autores principales: | , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2026
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2603.01094 |
| Etiquetas: |
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- Two-dimensional (2D) kagome materials have attracted considerable attention due to their unique electronic properties. Based on first-principles calculations and employing the "1+3" design strategy, we designed a class of composition-tunable 2D multilayer kagome materials, V<sub>6</sub>S<sub>n</sub>Se<sub>6-n</sub>Cl<sub>6</sub>, and identified four stable structures: V<sub>6</sub>Se<sub>6</sub>Cl<sub>6</sub>, V<sub>6</sub>S<sub>2</sub>Se<sub>4</sub>Cl<sub>6</sub>, V<sub>6</sub>S<sub>3</sub>Se<sub>3</sub>Cl<sub>6</sub>, and V<sub>6</sub>S<sub>5</sub>Se<sub>1</sub>Cl<sub>6</sub>. 2D V<sub>6</sub>S<sub>n</sub>Se<sub>6-n</sub>Cl<sub>6</sub> possesses three kagome layers, two of which are vanadium-based kagome layers, and the other is a sulfur or selenium atomic layer. Electronic structure analysis reveals that 2D V<sub>6</sub>S<sub>n</sub>Se<sub>6-n</sub>Cl<sub>6</sub> is a narrow direct-bandgap semiconductor with a bandgap ranging from 0.568 to 0.742 eV, and exhibits ultrahigh electron mobility up to 4*10<sup>4</sup> cm<sup>2</sup>V<sup>-1</sup>s<sup>-1</sup> . Orbital analysis further demonstrates that the bands contributed by the V-based kagome layers form flat bands and Dirac cones below the Fermi level, and show a relatively high Fermi velocity. In summary, 2D V<sub>6</sub>S<sub>n</sub>Se<sub>6-n</sub>Cl<sub>6</sub> provides an excellent platform for kagome physics research and the fabrication of nanoelectronic devices, adaptable to various device scenarios.