Ferroelectric switching of interfacial dipoles in $α$-RuCl$_3$/graphene heterostructure
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| Main Authors: | , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866917246398365696 |
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| author | Kim, Soyun Yun, Jo Hyun Choe, Junsik Kim, Dohun Taniguchi, Takashi Watanabe, Kenji Falson, Joseph Kim, Jun Sung Jin, Kyung-Hwan Cho, Gil Young Kim, Youngwook |
| author_facet | Kim, Soyun Yun, Jo Hyun Choe, Junsik Kim, Dohun Taniguchi, Takashi Watanabe, Kenji Falson, Joseph Kim, Jun Sung Jin, Kyung-Hwan Cho, Gil Young Kim, Youngwook |
| contents | We demonstrate electrically switchable, non-volatile dipoles in graphene/thin hBN/$α$-RuCl$_3$ heterostructures, stabilized purely by interfacial charge transfer across an atomically thin dielectric barrier. This mechanism requires no sliding or twisting to explicitly break inversion symmetry and produces robust ferroelectric-like hysteresis loops that emerge prominently near 30~K. Systematic measurements under strong in-plane and out-of-plane magnetic fields reveal negligible effects on the hysteresis characteristics, confirming that the primary mechanism driving the dipole switching is electrostatic. Our findings establish a distinct and robust route to electrically tunable ferroelectric phenomena in van der Waals heterostructures, opening opportunities to explore the interplay between interfacial charge transfer and temperature-tuned barrier crossing of dipole states at the atomic scale. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_07187 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Ferroelectric switching of interfacial dipoles in $α$-RuCl$_3$/graphene heterostructure Kim, Soyun Yun, Jo Hyun Choe, Junsik Kim, Dohun Taniguchi, Takashi Watanabe, Kenji Falson, Joseph Kim, Jun Sung Jin, Kyung-Hwan Cho, Gil Young Kim, Youngwook Materials Science Mesoscale and Nanoscale Physics Strongly Correlated Electrons We demonstrate electrically switchable, non-volatile dipoles in graphene/thin hBN/$α$-RuCl$_3$ heterostructures, stabilized purely by interfacial charge transfer across an atomically thin dielectric barrier. This mechanism requires no sliding or twisting to explicitly break inversion symmetry and produces robust ferroelectric-like hysteresis loops that emerge prominently near 30~K. Systematic measurements under strong in-plane and out-of-plane magnetic fields reveal negligible effects on the hysteresis characteristics, confirming that the primary mechanism driving the dipole switching is electrostatic. Our findings establish a distinct and robust route to electrically tunable ferroelectric phenomena in van der Waals heterostructures, opening opportunities to explore the interplay between interfacial charge transfer and temperature-tuned barrier crossing of dipole states at the atomic scale. |
| title | Ferroelectric switching of interfacial dipoles in $α$-RuCl$_3$/graphene heterostructure |
| topic | Materials Science Mesoscale and Nanoscale Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2508.07187 |