An unconventional platform for two-dimensional Kagome flat bands on semiconductor surfaces
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arXiv
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| Format: | Preprint |
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2023
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| _version_ | 1866914932850688000 |
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| author | Lee, Jae Hyuck Kim, GwanWoo Song, Inkyung Kim, Yejin Lee, Yeonjae Yoo, Sung Jong Cho, Deok-Yong Rhim, Jun-Won Jung, Jongkeun Kim, Gunn Kim, Changyoung |
| author_facet | Lee, Jae Hyuck Kim, GwanWoo Song, Inkyung Kim, Yejin Lee, Yeonjae Yoo, Sung Jong Cho, Deok-Yong Rhim, Jun-Won Jung, Jongkeun Kim, Gunn Kim, Changyoung |
| contents | In condensed matter physics, the Kagome lattice and its inherent flat bands have attracted considerable attention for their potential to host a variety of exotic physical phenomena. Despite extensive efforts to fabricate thin films of Kagome materials aimed at modulating the flat bands through electrostatic gating or strain manipulation, progress has been limited. Here, we report the observation of a novel $d$-orbital hybridized Kagome-derived flat band in Ag/Si(111) $\sqrt{3}\times\sqrt{3}$ as revealed by angle-resolved photoemission spectroscopy. Our findings indicate that silver atoms on a silicon substrate form a Kagome-like structure, where a delicate balance in the hopping parameters of the in-plane $d$-orbitals leads to destructive interference, resulting in a flat band. These results not only introduce a new platform for Kagome physics but also illuminate the potential for integrating metal-semiconductor interfaces into Kagome-related research, thereby opening a new avenue for exploring ideal two-dimensional Kagome systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_00265 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | An unconventional platform for two-dimensional Kagome flat bands on semiconductor surfaces Lee, Jae Hyuck Kim, GwanWoo Song, Inkyung Kim, Yejin Lee, Yeonjae Yoo, Sung Jong Cho, Deok-Yong Rhim, Jun-Won Jung, Jongkeun Kim, Gunn Kim, Changyoung Materials Science In condensed matter physics, the Kagome lattice and its inherent flat bands have attracted considerable attention for their potential to host a variety of exotic physical phenomena. Despite extensive efforts to fabricate thin films of Kagome materials aimed at modulating the flat bands through electrostatic gating or strain manipulation, progress has been limited. Here, we report the observation of a novel $d$-orbital hybridized Kagome-derived flat band in Ag/Si(111) $\sqrt{3}\times\sqrt{3}$ as revealed by angle-resolved photoemission spectroscopy. Our findings indicate that silver atoms on a silicon substrate form a Kagome-like structure, where a delicate balance in the hopping parameters of the in-plane $d$-orbitals leads to destructive interference, resulting in a flat band. These results not only introduce a new platform for Kagome physics but also illuminate the potential for integrating metal-semiconductor interfaces into Kagome-related research, thereby opening a new avenue for exploring ideal two-dimensional Kagome systems. |
| title | An unconventional platform for two-dimensional Kagome flat bands on semiconductor surfaces |
| topic | Materials Science |
| url | https://arxiv.org/abs/2401.00265 |