Spontaneous charge-ordered state in Bernal-stacked bilayer graphene
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866909155739041792 |
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| author | Jiang, Xiu-Cai Song, Ze-Yi Ruan, Ze Zhang, Yu-Zhong |
| author_facet | Jiang, Xiu-Cai Song, Ze-Yi Ruan, Ze Zhang, Yu-Zhong |
| contents | We propose that a weakly spontaneous charge-ordered insulating state probably exists in Bernal-stacked bilayer graphene which can account for experimentally observed non-monotonic behavior of resistance as a function of the gated field, namely, the gap closes and reopens at a critical gated field. The underlying physics is demonstrated by a simple model on a corresponding lattice that contains the nearest intralayer and interlayer hoppings, electric field, and staggered potential between different sublattices. Combining density functional theory calculations with model analyses, we argue that the interlayer van der Waals interactions cooperating with ripples may be responsible for the staggered potential which induces a charge-ordered insulating state in the absence of the electric field. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_00692 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Spontaneous charge-ordered state in Bernal-stacked bilayer graphene Jiang, Xiu-Cai Song, Ze-Yi Ruan, Ze Zhang, Yu-Zhong Mesoscale and Nanoscale Physics Materials Science Strongly Correlated Electrons We propose that a weakly spontaneous charge-ordered insulating state probably exists in Bernal-stacked bilayer graphene which can account for experimentally observed non-monotonic behavior of resistance as a function of the gated field, namely, the gap closes and reopens at a critical gated field. The underlying physics is demonstrated by a simple model on a corresponding lattice that contains the nearest intralayer and interlayer hoppings, electric field, and staggered potential between different sublattices. Combining density functional theory calculations with model analyses, we argue that the interlayer van der Waals interactions cooperating with ripples may be responsible for the staggered potential which induces a charge-ordered insulating state in the absence of the electric field. |
| title | Spontaneous charge-ordered state in Bernal-stacked bilayer graphene |
| topic | Mesoscale and Nanoscale Physics Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2404.00692 |