Quantum simulation of honeycomb lattice model by high-order moiré pattern
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arXiv
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| Autori principali: | , , , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866909173918203904 |
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| author | Wan, Qiang Wu, Chunlong Luo, Xun-Jiang Dai, Shenghao Peng, Cao Li, Renzhe Mo, Shangkun Zhao, Keming Qiu, Wen-Xuan Zhong, Hao Li, Yiwei Zhang, Chendong Wu, Fengcheng Xu, Nan |
| author_facet | Wan, Qiang Wu, Chunlong Luo, Xun-Jiang Dai, Shenghao Peng, Cao Li, Renzhe Mo, Shangkun Zhao, Keming Qiu, Wen-Xuan Zhong, Hao Li, Yiwei Zhang, Chendong Wu, Fengcheng Xu, Nan |
| contents | Moiré superlattices have become an emergent solid-state platform for simulating quantum lattice models. However, in single moiré device, Hamiltonians parameters like lattice constant, hopping and interaction terms can hardly be manipulated, limiting the controllability and accessibility of moire quantum simulator. Here, by combining angle-resolved photoemission spectroscopy and theoretical analysis, we demonstrate that high-order moiré patterns in graphene-monolayered xenon/krypton heterostructures can simulate honeycomb model in mesoscale, with in-situ tunable Hamiltonians parameters. The length scale of simulated lattice constant can be tuned by annealing processes, which in-situ adjusts intervalley interaction and hopping parameters in the simulated honeycomb lattice. The sign of the lattice constant can be switched by choosing xenon or krypton monolayer deposited on graphene, which controls sublattice degree of freedom and valley arrangment of Dirac fermions. Our work establishes a novel path for experimentally simulating the honeycomb model with tunable parameters by high-order moiré patterns. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_11934 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Quantum simulation of honeycomb lattice model by high-order moiré pattern Wan, Qiang Wu, Chunlong Luo, Xun-Jiang Dai, Shenghao Peng, Cao Li, Renzhe Mo, Shangkun Zhao, Keming Qiu, Wen-Xuan Zhong, Hao Li, Yiwei Zhang, Chendong Wu, Fengcheng Xu, Nan Materials Science Mesoscale and Nanoscale Physics Strongly Correlated Electrons Moiré superlattices have become an emergent solid-state platform for simulating quantum lattice models. However, in single moiré device, Hamiltonians parameters like lattice constant, hopping and interaction terms can hardly be manipulated, limiting the controllability and accessibility of moire quantum simulator. Here, by combining angle-resolved photoemission spectroscopy and theoretical analysis, we demonstrate that high-order moiré patterns in graphene-monolayered xenon/krypton heterostructures can simulate honeycomb model in mesoscale, with in-situ tunable Hamiltonians parameters. The length scale of simulated lattice constant can be tuned by annealing processes, which in-situ adjusts intervalley interaction and hopping parameters in the simulated honeycomb lattice. The sign of the lattice constant can be switched by choosing xenon or krypton monolayer deposited on graphene, which controls sublattice degree of freedom and valley arrangment of Dirac fermions. Our work establishes a novel path for experimentally simulating the honeycomb model with tunable parameters by high-order moiré patterns. |
| title | Quantum simulation of honeycomb lattice model by high-order moiré pattern |
| topic | Materials Science Mesoscale and Nanoscale Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2404.11934 |