Engineering Majorana Kramers Pairs In Synthetic High Spin Chern Insulators
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| Format: | Preprint |
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2024
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| _version_ | 1866913902567096320 |
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| author | Hung, Yi-Chun Hsu, Chen-Hsuan Bansil, Arun |
| author_facet | Hung, Yi-Chun Hsu, Chen-Hsuan Bansil, Arun |
| contents | High spin-Chern-number topological phases provide a promising low-dimensional platform for realizing double-helical edge states. In this letter, we show how these edge states can host a variety of phases driven by electron interaction effects, including multi-channel helical Luttinger liquid, spin density wave, superconducting phases, and a new type of $π$-junction analog of the latter two, where the transitions between the phases can be controlled. The superconducting phase in the interacting system is shown to be adiabatically connected to a time-reversal-symmetric topological superconductor in the non-interacting DIII class. This connection stabilizes Majorana Kramers pairs as domain wall states at the interface between the superconducting and $π$-spin-density wave phases, with the latter exhibiting a time-reversal-symmetric spin-density wave phase. We discuss the possibility of realizing our proposed scheme for generating Majorana Kramers pairs in a cold-atom based platform with existing techniques, and how it could offer potential advantages over other approaches. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_08632 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Engineering Majorana Kramers Pairs In Synthetic High Spin Chern Insulators Hung, Yi-Chun Hsu, Chen-Hsuan Bansil, Arun Strongly Correlated Electrons Mesoscale and Nanoscale Physics Atomic and Molecular Clusters High spin-Chern-number topological phases provide a promising low-dimensional platform for realizing double-helical edge states. In this letter, we show how these edge states can host a variety of phases driven by electron interaction effects, including multi-channel helical Luttinger liquid, spin density wave, superconducting phases, and a new type of $π$-junction analog of the latter two, where the transitions between the phases can be controlled. The superconducting phase in the interacting system is shown to be adiabatically connected to a time-reversal-symmetric topological superconductor in the non-interacting DIII class. This connection stabilizes Majorana Kramers pairs as domain wall states at the interface between the superconducting and $π$-spin-density wave phases, with the latter exhibiting a time-reversal-symmetric spin-density wave phase. We discuss the possibility of realizing our proposed scheme for generating Majorana Kramers pairs in a cold-atom based platform with existing techniques, and how it could offer potential advantages over other approaches. |
| title | Engineering Majorana Kramers Pairs In Synthetic High Spin Chern Insulators |
| topic | Strongly Correlated Electrons Mesoscale and Nanoscale Physics Atomic and Molecular Clusters |
| url | https://arxiv.org/abs/2412.08632 |