Rashba Spin-Orbit Driven Topological Phase Transitions in Graphene Nanoribbon Heterostructures
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866915948174245888 |
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| author | Wu, Hao-Ru You, Jhih-Shih Chen, Yiing-Rei Chen, Hong-Yi |
| author_facet | Wu, Hao-Ru You, Jhih-Shih Chen, Yiing-Rei Chen, Hong-Yi |
| contents | We demonstrate that the interplay between structural geometry and Rashba spin-orbit coupling generates nontrivial topological phases in honeycomb nanoribbon heterostructures. We consider an armchair nanoribbon in which a Rashba spin-orbit coupled region is embedded between pristine segments. Increasing the Rashba coupling induces symmetry-protected interface states localized at the junction between topologically distinct regions, which remain robust against edge perturbations. For finite ribbon widths, Rashba spin-orbit coupling drives a gap closing and reopening, signaling a topological phase transition without modifying the lattice structure. Our results reveal a mechanism by which interfacial geometry and spin-orbit interaction cooperatively engineer tunable topological states in graphene-based nanostructures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_19568 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Rashba Spin-Orbit Driven Topological Phase Transitions in Graphene Nanoribbon Heterostructures Wu, Hao-Ru You, Jhih-Shih Chen, Yiing-Rei Chen, Hong-Yi Mesoscale and Nanoscale Physics We demonstrate that the interplay between structural geometry and Rashba spin-orbit coupling generates nontrivial topological phases in honeycomb nanoribbon heterostructures. We consider an armchair nanoribbon in which a Rashba spin-orbit coupled region is embedded between pristine segments. Increasing the Rashba coupling induces symmetry-protected interface states localized at the junction between topologically distinct regions, which remain robust against edge perturbations. For finite ribbon widths, Rashba spin-orbit coupling drives a gap closing and reopening, signaling a topological phase transition without modifying the lattice structure. Our results reveal a mechanism by which interfacial geometry and spin-orbit interaction cooperatively engineer tunable topological states in graphene-based nanostructures. |
| title | Rashba Spin-Orbit Driven Topological Phase Transitions in Graphene Nanoribbon Heterostructures |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2602.19568 |