Electronic phonon induced magnetism in moiré Mott-Wigner crystals
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866909995254153216 |
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| author | Liang, Weide Du, Xiaoying Zhang, Na Yu, Hongyi |
| author_facet | Liang, Weide Du, Xiaoying Zhang, Na Yu, Hongyi |
| contents | We show that magnetism in moiré Mott-Wigner crystals can be induced by the collective vibration of electrons around their equilibrium positions (i.e., electronic phonons), even without spin interactions between electrons. Due to a geometric valley-orbit coupling from the Berry phase effect, the zero-point energy of electronic phonons reaches minimum when electrons are fully valley polarized. This leads to a spontaneous magnetization when below a critical temperature. We also propose to engineer the magnetism through the photoexcitation of chiral electronic phonons. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_13172 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Electronic phonon induced magnetism in moiré Mott-Wigner crystals Liang, Weide Du, Xiaoying Zhang, Na Yu, Hongyi Mesoscale and Nanoscale Physics Strongly Correlated Electrons We show that magnetism in moiré Mott-Wigner crystals can be induced by the collective vibration of electrons around their equilibrium positions (i.e., electronic phonons), even without spin interactions between electrons. Due to a geometric valley-orbit coupling from the Berry phase effect, the zero-point energy of electronic phonons reaches minimum when electrons are fully valley polarized. This leads to a spontaneous magnetization when below a critical temperature. We also propose to engineer the magnetism through the photoexcitation of chiral electronic phonons. |
| title | Electronic phonon induced magnetism in moiré Mott-Wigner crystals |
| topic | Mesoscale and Nanoscale Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2601.13172 |