Competing magnetic states on the surface of multilayer ABC-stacked graphene
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866916511560499200 |
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| author | Braz, Lauro B. Nag, Tanay Black-Schaffer, Annica M. |
| author_facet | Braz, Lauro B. Nag, Tanay Black-Schaffer, Annica M. |
| contents | We study interaction-mediated magnetism on the surface of ABC-multilayer graphene driven by its zero-energy topological flat bands. Using the random-phase approximation we treat onsite Hubbard repulsion and find multiple competing magnetic states, due to both intra- and inter-valley scattering, with the latter causing an enlarged magnetic unit cell. At half-filling and when the Hubbard repulsion is weak, we observe two different ferromagnetic orders. Once the Hubbard repulsion becomes more realistic, new ferrimagnetic orders arise with distinct incommensurate intra- or inter-valley scattering vectors depending on interaction strength and doping, leading to a multitude of competing magnetic states. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2401_16345 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Competing magnetic states on the surface of multilayer ABC-stacked graphene Braz, Lauro B. Nag, Tanay Black-Schaffer, Annica M. Mesoscale and Nanoscale Physics Strongly Correlated Electrons We study interaction-mediated magnetism on the surface of ABC-multilayer graphene driven by its zero-energy topological flat bands. Using the random-phase approximation we treat onsite Hubbard repulsion and find multiple competing magnetic states, due to both intra- and inter-valley scattering, with the latter causing an enlarged magnetic unit cell. At half-filling and when the Hubbard repulsion is weak, we observe two different ferromagnetic orders. Once the Hubbard repulsion becomes more realistic, new ferrimagnetic orders arise with distinct incommensurate intra- or inter-valley scattering vectors depending on interaction strength and doping, leading to a multitude of competing magnetic states. |
| title | Competing magnetic states on the surface of multilayer ABC-stacked graphene |
| topic | Mesoscale and Nanoscale Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2401.16345 |