Correlated interlayer quantum Hall state in large-angle twisted trilayer graphene
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arXiv
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866910010753155072 |
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| author | Kim, Dohun Lee, Gyeoul Leconte, Nicolas Jin, Seyoung Taniguchi, Takashi Watanabe, Kenji Jung, Jeil Cho, Gil Young Kim, Youngwook |
| author_facet | Kim, Dohun Lee, Gyeoul Leconte, Nicolas Jin, Seyoung Taniguchi, Takashi Watanabe, Kenji Jung, Jeil Cho, Gil Young Kim, Youngwook |
| contents | Trilayer graphene allows systematic control of its electronic structure through stacking sequence and twist geometry, providing a versatile platform for correlated states. Here we report magnetotransport in alternating twisted trilayer graphene with a twist angle of about 5$^{\circ}$. The data reveal an electron-hole asymmetry that can be captured by introducing layer-dependent potential shifts. At charge neutrality ($ν_{\mathrm{tot}}=0$), three low-resistance states appear, which Hartree-Fock mean-field analysis attributes to emerging spin-resolved helical edge modes similar to those of quantum spin Hall insulators. At $ν_{\mathrm{tot}}=-1$, we also observe suppressed resistance when the middle and bottom layers are each half filled while the top layer remains inert at $ν=-2$, consistent with an interlayer excitonic quantum Hall state. These results demonstrate correlated interlayer quantum Hall phases in alternating twisted trilayer graphene, including spin-resolved edge transport and excitonic order. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_10930 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Correlated interlayer quantum Hall state in large-angle twisted trilayer graphene Kim, Dohun Lee, Gyeoul Leconte, Nicolas Jin, Seyoung Taniguchi, Takashi Watanabe, Kenji Jung, Jeil Cho, Gil Young Kim, Youngwook Mesoscale and Nanoscale Physics Materials Science Strongly Correlated Electrons Trilayer graphene allows systematic control of its electronic structure through stacking sequence and twist geometry, providing a versatile platform for correlated states. Here we report magnetotransport in alternating twisted trilayer graphene with a twist angle of about 5$^{\circ}$. The data reveal an electron-hole asymmetry that can be captured by introducing layer-dependent potential shifts. At charge neutrality ($ν_{\mathrm{tot}}=0$), three low-resistance states appear, which Hartree-Fock mean-field analysis attributes to emerging spin-resolved helical edge modes similar to those of quantum spin Hall insulators. At $ν_{\mathrm{tot}}=-1$, we also observe suppressed resistance when the middle and bottom layers are each half filled while the top layer remains inert at $ν=-2$, consistent with an interlayer excitonic quantum Hall state. These results demonstrate correlated interlayer quantum Hall phases in alternating twisted trilayer graphene, including spin-resolved edge transport and excitonic order. |
| title | Correlated interlayer quantum Hall state in large-angle twisted trilayer graphene |
| topic | Mesoscale and Nanoscale Physics Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2509.10930 |