Evidence of Momentum Space Condensation in Rhombohedral Hexalayer Graphene
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866918247016693760 |
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| author | Morissette, Erin Qin, Peiyu Watanabe, K. Taniguchi, T. Li, J. I. A. |
| author_facet | Morissette, Erin Qin, Peiyu Watanabe, K. Taniguchi, T. Li, J. I. A. |
| contents | Spontaneous symmetry breaking provides a powerful window into the nature of underlying electronic orders. In strongly correlated systems, multiple symmetry-breaking orders can arise simultaneously. and their interplay generates an intricate landscape of quantum phases that has remained a central focus of condensed-matter research. In this work, we report a previously unidentified electronic phase in rhombohedral hexalayer graphene, distinguished by the simultaneous breaking of rotational, time-reversal, and inversion symmetries. Broken rotational symmetry is evidenced through anisotropic transport in angle-resolved measurements, while the onset of both the anomalous Hall effect and the nonlinear Hall effect signals the breaking of time-reversal and inversion symmetries. These combined signatures reveal an emergent order consistent with momentum-space condensation, a theoretically anticipated phenomenon realized here experimentally for the first time. This mechanism establishes a natural framework for understanding a broader class of correlated phases known to emerge from the flat bands of two-dimensional materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_09954 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Evidence of Momentum Space Condensation in Rhombohedral Hexalayer Graphene Morissette, Erin Qin, Peiyu Watanabe, K. Taniguchi, T. Li, J. I. A. Mesoscale and Nanoscale Physics Spontaneous symmetry breaking provides a powerful window into the nature of underlying electronic orders. In strongly correlated systems, multiple symmetry-breaking orders can arise simultaneously. and their interplay generates an intricate landscape of quantum phases that has remained a central focus of condensed-matter research. In this work, we report a previously unidentified electronic phase in rhombohedral hexalayer graphene, distinguished by the simultaneous breaking of rotational, time-reversal, and inversion symmetries. Broken rotational symmetry is evidenced through anisotropic transport in angle-resolved measurements, while the onset of both the anomalous Hall effect and the nonlinear Hall effect signals the breaking of time-reversal and inversion symmetries. These combined signatures reveal an emergent order consistent with momentum-space condensation, a theoretically anticipated phenomenon realized here experimentally for the first time. This mechanism establishes a natural framework for understanding a broader class of correlated phases known to emerge from the flat bands of two-dimensional materials. |
| title | Evidence of Momentum Space Condensation in Rhombohedral Hexalayer Graphene |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2503.09954 |