Flux-Driven Conductance Scaling in Disordered Topological Insulator Nanowires
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866912923225423872 |
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| author | Haver, Shimon Arie Rimon, Emuna Grosfeld, Eytan |
| author_facet | Haver, Shimon Arie Rimon, Emuna Grosfeld, Eytan |
| contents | We study quantum transport in disordered topological insulator nanowires (TINWs) under axial magnetic flux. At integer flux quanta, spin-momentum locking produces weak anti-localization peaks, while at half-integer flux quanta a helical mode protected by time-reversal symmetry (TRS) suppresses backscattering. By analyzing the flux dependence of the localization length, we uncover critical scaling around half-integer flux quanta, reflecting the competition between disorder scattering and flux-induced breaking of TRS protection. As the disorder strength increases, we identify a crossover in scaling behavior that drives the system into a regime governed by a universal critical exponent. Our results demonstrate a scaling collapse across flux values, establishing a universal regime of flux-driven delocalization in TINWs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_20884 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Flux-Driven Conductance Scaling in Disordered Topological Insulator Nanowires Haver, Shimon Arie Rimon, Emuna Grosfeld, Eytan Mesoscale and Nanoscale Physics We study quantum transport in disordered topological insulator nanowires (TINWs) under axial magnetic flux. At integer flux quanta, spin-momentum locking produces weak anti-localization peaks, while at half-integer flux quanta a helical mode protected by time-reversal symmetry (TRS) suppresses backscattering. By analyzing the flux dependence of the localization length, we uncover critical scaling around half-integer flux quanta, reflecting the competition between disorder scattering and flux-induced breaking of TRS protection. As the disorder strength increases, we identify a crossover in scaling behavior that drives the system into a regime governed by a universal critical exponent. Our results demonstrate a scaling collapse across flux values, establishing a universal regime of flux-driven delocalization in TINWs. |
| title | Flux-Driven Conductance Scaling in Disordered Topological Insulator Nanowires |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2602.20884 |