Bond-density-wave orders induced by geometric frustration in the kagome metal CeRu3Si2
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arXiv
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866914439466319872 |
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| author | Misawa, Ryo Kitou, Shunsuke Yamada, Rinsuke Feng, Xiaolong Nakano, Ryota Baral, Priya Ranjan Nakamura, Yuiga Schoop, Leslie M. Motome, Yukitoshi Arima, Taka-hisa Yu, Xiuzhen Hirschberger, Max |
| author_facet | Misawa, Ryo Kitou, Shunsuke Yamada, Rinsuke Feng, Xiaolong Nakano, Ryota Baral, Priya Ranjan Nakamura, Yuiga Schoop, Leslie M. Motome, Yukitoshi Arima, Taka-hisa Yu, Xiuzhen Hirschberger, Max |
| contents | Geometric frustration gives rise to vast manifolds of degenerate ground states and competing orders in spin and charge systems. Typically, classical ground states are governed by a local ``zero-sum constraint" that relieves frustrated antiferromagnetic interactions or Coulomb repulsion. To date, the paradigm of geometric frustration has yielded a rich landscape of emergent phases, from spin ices and quantum spin liquids to charge glasses. However, an analogous phase rooted in chemical bonding has yet to be firmly demonstrated. Here we report the discovery of bond-density-wave orders induced by geometric frustration in the kagome metal CeRu$_3$Si$_2$ above room temperature. Through synchrotron X-ray diffraction, real-space transmission electron microscopy, and model calculations, we observe two distinct long-period superlattices with harmonic and anharmonic structural modulations. Crucially, interlayer bonds between kagome planes modulate in a sublattice-selective manner to fulfill the zero-sum constraint on the kagome lattice. We demonstrate the potential of kagome metals to host complex bond-ordered states constrained by geometric frustration and establish chemical bonding as a distinct pathway to frustration physics in quantum materials even above room temperature. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_01691 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Bond-density-wave orders induced by geometric frustration in the kagome metal CeRu3Si2 Misawa, Ryo Kitou, Shunsuke Yamada, Rinsuke Feng, Xiaolong Nakano, Ryota Baral, Priya Ranjan Nakamura, Yuiga Schoop, Leslie M. Motome, Yukitoshi Arima, Taka-hisa Yu, Xiuzhen Hirschberger, Max Strongly Correlated Electrons Geometric frustration gives rise to vast manifolds of degenerate ground states and competing orders in spin and charge systems. Typically, classical ground states are governed by a local ``zero-sum constraint" that relieves frustrated antiferromagnetic interactions or Coulomb repulsion. To date, the paradigm of geometric frustration has yielded a rich landscape of emergent phases, from spin ices and quantum spin liquids to charge glasses. However, an analogous phase rooted in chemical bonding has yet to be firmly demonstrated. Here we report the discovery of bond-density-wave orders induced by geometric frustration in the kagome metal CeRu$_3$Si$_2$ above room temperature. Through synchrotron X-ray diffraction, real-space transmission electron microscopy, and model calculations, we observe two distinct long-period superlattices with harmonic and anharmonic structural modulations. Crucially, interlayer bonds between kagome planes modulate in a sublattice-selective manner to fulfill the zero-sum constraint on the kagome lattice. We demonstrate the potential of kagome metals to host complex bond-ordered states constrained by geometric frustration and establish chemical bonding as a distinct pathway to frustration physics in quantum materials even above room temperature. |
| title | Bond-density-wave orders induced by geometric frustration in the kagome metal CeRu3Si2 |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2604.01691 |