Signatures of unconventional superconductivity near reentrant and fractional quantum anomalous Hall insulators
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2025
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866917512620277760 |
|---|---|
| author | Xu, Fan Sun, Zheng Li, Jiayi Zheng, Ce Xu, Cheng Gao, Jingjing Jia, Tongtong Su, Yanfei Watanabe, Kenji Taniguchi, Takashi Tong, Bingbing Lu, Li Jia, Jinfeng Shi, Zhiwen Jiang, Shengwei Lin, Junhao Zhang, Yuanbo Zhang, Yang Lei, Shiming Liu, Xiaoxue Li, Tingxin |
| author_facet | Xu, Fan Sun, Zheng Li, Jiayi Zheng, Ce Xu, Cheng Gao, Jingjing Jia, Tongtong Su, Yanfei Watanabe, Kenji Taniguchi, Takashi Tong, Bingbing Lu, Li Jia, Jinfeng Shi, Zhiwen Jiang, Shengwei Lin, Junhao Zhang, Yuanbo Zhang, Yang Lei, Shiming Liu, Xiaoxue Li, Tingxin |
| contents | Two-dimensional moiré Chern bands provide an exceptional platform for exploring a variety of many-body quantum phases at zero magnetic field within a lattice system. One particular intriguing possibility is that flat Chern bands can, in principle, support exotic superconducting phases together with fractional topological phases. Here, we report the observation of integer and fractional quantum anomalous Hall effects, the reentrant quantum anomalous Hall effect, and superconductivity within the first moiré Chern band of twisted bilayer MoTe2. The superconducting phase emerges from a normal state exhibiting anomalous Hall effects. Our results present the first example of superconductivity emerging within a flat Chern band that simultaneously hosts fractional quantum anomalous effects, a phenomenon never observed in any other systems. Our work expands the understanding of emergent quantum phenomena in moiré Chern bands, and offers a nearly ideal platform for engineering Majorana and parafermion zero modes in gate-controlled hybrid devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_06972 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Signatures of unconventional superconductivity near reentrant and fractional quantum anomalous Hall insulators Xu, Fan Sun, Zheng Li, Jiayi Zheng, Ce Xu, Cheng Gao, Jingjing Jia, Tongtong Su, Yanfei Watanabe, Kenji Taniguchi, Takashi Tong, Bingbing Lu, Li Jia, Jinfeng Shi, Zhiwen Jiang, Shengwei Lin, Junhao Zhang, Yuanbo Zhang, Yang Lei, Shiming Liu, Xiaoxue Li, Tingxin Mesoscale and Nanoscale Physics Superconductivity Two-dimensional moiré Chern bands provide an exceptional platform for exploring a variety of many-body quantum phases at zero magnetic field within a lattice system. One particular intriguing possibility is that flat Chern bands can, in principle, support exotic superconducting phases together with fractional topological phases. Here, we report the observation of integer and fractional quantum anomalous Hall effects, the reentrant quantum anomalous Hall effect, and superconductivity within the first moiré Chern band of twisted bilayer MoTe2. The superconducting phase emerges from a normal state exhibiting anomalous Hall effects. Our results present the first example of superconductivity emerging within a flat Chern band that simultaneously hosts fractional quantum anomalous effects, a phenomenon never observed in any other systems. Our work expands the understanding of emergent quantum phenomena in moiré Chern bands, and offers a nearly ideal platform for engineering Majorana and parafermion zero modes in gate-controlled hybrid devices. |
| title | Signatures of unconventional superconductivity near reentrant and fractional quantum anomalous Hall insulators |
| topic | Mesoscale and Nanoscale Physics Superconductivity |
| url | https://arxiv.org/abs/2504.06972 |