Evidence of Mott Insulator with Thermally Induced Melting Behavior in Kagome Compound Nb3Cl8
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arXiv
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| Autores principales: | , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
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| _version_ | 1866911336530706432 |
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| author | Yang, Qiu Wu, Min Duan, Jingyi Ma, Zhijie Li, Lingxiao Huo, Zihao Zhang, Zaizhe Watanabe, Kenji Taniguchi, Takashi Zhao, Xiaoxu Chen, Yi Shi, Youguo Jiang, Wei Liu, Kaihui Lu, Xiaobo |
| author_facet | Yang, Qiu Wu, Min Duan, Jingyi Ma, Zhijie Li, Lingxiao Huo, Zihao Zhang, Zaizhe Watanabe, Kenji Taniguchi, Takashi Zhao, Xiaoxu Chen, Yi Shi, Youguo Jiang, Wei Liu, Kaihui Lu, Xiaobo |
| contents | The kagome lattice provides a playground to explore novel correlated quantum states due to the presence of flat bands in its electronic structure. Recently discovered layered kagome compound Nb3Cl8 has been proposed as a Mott insulator coming from the half-filled flat band. Here we have carried out systematic transport study to uncover the evidence of Mott insulator in Nb3Cl8 thin flakes. Bipolar semiconducting property with Fermi level close to conduction band has been revealed. We have further probed the chemical potential of Nb3Cl8 by tracing the charge neutrality point of the monolayer graphene proximate to Nb3Cl8. The gap of Nb3Cl8 flakes is approximately 1.10 eV at 100 K and shows pronounced temperature dependence, decreasing substantially with increasing temperature to ~0.63 eV at 300 K. The melting behavior of the gapped state is in consistent with theoretically proposed Mott insulator in Nb3Cl8. Our work has demonstrated Nb3Cl8 as a promising platform to study strongly correlated physics at relatively high temperature. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_08730 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Evidence of Mott Insulator with Thermally Induced Melting Behavior in Kagome Compound Nb3Cl8 Yang, Qiu Wu, Min Duan, Jingyi Ma, Zhijie Li, Lingxiao Huo, Zihao Zhang, Zaizhe Watanabe, Kenji Taniguchi, Takashi Zhao, Xiaoxu Chen, Yi Shi, Youguo Jiang, Wei Liu, Kaihui Lu, Xiaobo Strongly Correlated Electrons Mesoscale and Nanoscale Physics The kagome lattice provides a playground to explore novel correlated quantum states due to the presence of flat bands in its electronic structure. Recently discovered layered kagome compound Nb3Cl8 has been proposed as a Mott insulator coming from the half-filled flat band. Here we have carried out systematic transport study to uncover the evidence of Mott insulator in Nb3Cl8 thin flakes. Bipolar semiconducting property with Fermi level close to conduction band has been revealed. We have further probed the chemical potential of Nb3Cl8 by tracing the charge neutrality point of the monolayer graphene proximate to Nb3Cl8. The gap of Nb3Cl8 flakes is approximately 1.10 eV at 100 K and shows pronounced temperature dependence, decreasing substantially with increasing temperature to ~0.63 eV at 300 K. The melting behavior of the gapped state is in consistent with theoretically proposed Mott insulator in Nb3Cl8. Our work has demonstrated Nb3Cl8 as a promising platform to study strongly correlated physics at relatively high temperature. |
| title | Evidence of Mott Insulator with Thermally Induced Melting Behavior in Kagome Compound Nb3Cl8 |
| topic | Strongly Correlated Electrons Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2506.08730 |