Swapping exchange and spin-orbit induced correlated phases in proximitized Bernal bilayer graphene
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arXiv
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| Format: | Preprint |
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2023
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| _version_ | 1866908425591455744 |
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| author | Zhumagulov, Yaroslav Kochan, Denis Fabian, Jaroslav |
| author_facet | Zhumagulov, Yaroslav Kochan, Denis Fabian, Jaroslav |
| contents | Ex-so-tic van der Waals heterostructures take advantage of the electrically tunable layer polarization to swap proximity exchange and spin-orbit coupling in the electronically active region. Perhaps the simplest example is Bernal bilayer graphene (BBG) encapsulated by a layered magnet from one side and a strong spin-orbit material from the other. Taking WS$_2$/BBG/Cr$_2$Ge$_2$Te$_6$ as a representative ex-so-tronic device, we employ realistic \emph{ab initio}-inspired Hamiltonians and effective electron-electron interactions to investigate the emergence of correlated phases within the random phase approximation. We find that for a given doping level, exchange and spin-orbit coupling induced Stoner and intervalley coherence instabilities can be swapped, allowing to explore the full spectrum of correlated phases within a single device. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2307_16025 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Swapping exchange and spin-orbit induced correlated phases in proximitized Bernal bilayer graphene Zhumagulov, Yaroslav Kochan, Denis Fabian, Jaroslav Materials Science Mesoscale and Nanoscale Physics Strongly Correlated Electrons Ex-so-tic van der Waals heterostructures take advantage of the electrically tunable layer polarization to swap proximity exchange and spin-orbit coupling in the electronically active region. Perhaps the simplest example is Bernal bilayer graphene (BBG) encapsulated by a layered magnet from one side and a strong spin-orbit material from the other. Taking WS$_2$/BBG/Cr$_2$Ge$_2$Te$_6$ as a representative ex-so-tronic device, we employ realistic \emph{ab initio}-inspired Hamiltonians and effective electron-electron interactions to investigate the emergence of correlated phases within the random phase approximation. We find that for a given doping level, exchange and spin-orbit coupling induced Stoner and intervalley coherence instabilities can be swapped, allowing to explore the full spectrum of correlated phases within a single device. |
| title | Swapping exchange and spin-orbit induced correlated phases in proximitized Bernal bilayer graphene |
| topic | Materials Science Mesoscale and Nanoscale Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2307.16025 |