Beating Fabry-Pérot interference pattern in a magnonic scattering junction in the graphene quantum Hall ferromagnet
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2022
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| _version_ | 1866929509184307200 |
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| author | Atteia, Jonathan Roulleau, Preden Goerbig, Mark O. |
| author_facet | Atteia, Jonathan Roulleau, Preden Goerbig, Mark O. |
| contents | At filling factor $ν=0,\pm1$, the ground state of graphene is a particular SU(4) ferromagnet which hosts a rich phase diagram along with several spin, pseudospin or "entanglement" magnon modes. Motivated by recent experiments, we study a $ν=-1|0|-1$ Fabry-Pérot magnonic junction. If the ground state at $ν=0$ is spin polarized, there exist two spin modes which interfere and create a beating pattern, while pseudospin modes are reflected. The same scenario occurs for pseudospin magnon if the $ν=0$ ground state is pseudospin polarized. The observation of such an interference pattern would provide information on the low-energy anisotropies and thus on the ground state. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2204_12795 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Beating Fabry-Pérot interference pattern in a magnonic scattering junction in the graphene quantum Hall ferromagnet Atteia, Jonathan Roulleau, Preden Goerbig, Mark O. Mesoscale and Nanoscale Physics At filling factor $ν=0,\pm1$, the ground state of graphene is a particular SU(4) ferromagnet which hosts a rich phase diagram along with several spin, pseudospin or "entanglement" magnon modes. Motivated by recent experiments, we study a $ν=-1|0|-1$ Fabry-Pérot magnonic junction. If the ground state at $ν=0$ is spin polarized, there exist two spin modes which interfere and create a beating pattern, while pseudospin modes are reflected. The same scenario occurs for pseudospin magnon if the $ν=0$ ground state is pseudospin polarized. The observation of such an interference pattern would provide information on the low-energy anisotropies and thus on the ground state. |
| title | Beating Fabry-Pérot interference pattern in a magnonic scattering junction in the graphene quantum Hall ferromagnet |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2204.12795 |