Enregistré dans:
| Auteurs principaux: | , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2026
|
| Sujets: | |
| Accès en ligne: | https://arxiv.org/abs/2602.23612 |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866908871326433280 |
|---|---|
| author | Xie, Renjie Hao, Bowen Ge, Min Zhang, Shenjin Zhai, Rongjing Bi, Jiachang Zhang, Shunda Xiao, Shaozhu Zhang, Fengfeng Yi, Hee Taek Oh, Seongshik Zhou, Tong Cao, Yanwei Yao, Xiong |
| author_facet | Xie, Renjie Hao, Bowen Ge, Min Zhang, Shenjin Zhai, Rongjing Bi, Jiachang Zhang, Shunda Xiao, Shaozhu Zhang, Fengfeng Yi, Hee Taek Oh, Seongshik Zhou, Tong Cao, Yanwei Yao, Xiong |
| contents | High-quality topological insulator-superconductor (TI-SC) heterostructure with an atomically sharp and well-controlled interface is crucial for realizing topological superconductivity and topological quantum qubit. In particular, many studies of TI-SC heterostructures have focused on inducing superconducting gap in the TI layer via proximity effect, while the active manipulation of superconductivity in the SC layer remains largely unexplored. In this work, we fabricated TI/TiN heterostructures using highly air-stable, ultrathin TiN films as the SC layer, and observed an interface-enhanced superconductivity that contrasts with the conventional proximity effect in superconductor-normal metal interface. Band structure measurements reveal a consistent shift of Dirac point with Tc enhancement. Interfacial charge transfer provides a plausible explanation for this shift based on the systematic analysis and is therefore a likely contributor to the observed Tc enhancement. First principles calculations elucidate the charge transfer pathways, highlighting the critical role of the interfacial BiTe (BiSe)bilayer. Our results not only provide a tunable TI-SC hybrid system with robust superconductivity at ultrathin thickness, but also offer a potential route for manipulating superconductivity in TI-SC heterostructures via interface engineering. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_23612 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Interface-Enhanced Superconductivity in Ultrathin TiN Proximitized by Topological Insulators Xie, Renjie Hao, Bowen Ge, Min Zhang, Shenjin Zhai, Rongjing Bi, Jiachang Zhang, Shunda Xiao, Shaozhu Zhang, Fengfeng Yi, Hee Taek Oh, Seongshik Zhou, Tong Cao, Yanwei Yao, Xiong Materials Science High-quality topological insulator-superconductor (TI-SC) heterostructure with an atomically sharp and well-controlled interface is crucial for realizing topological superconductivity and topological quantum qubit. In particular, many studies of TI-SC heterostructures have focused on inducing superconducting gap in the TI layer via proximity effect, while the active manipulation of superconductivity in the SC layer remains largely unexplored. In this work, we fabricated TI/TiN heterostructures using highly air-stable, ultrathin TiN films as the SC layer, and observed an interface-enhanced superconductivity that contrasts with the conventional proximity effect in superconductor-normal metal interface. Band structure measurements reveal a consistent shift of Dirac point with Tc enhancement. Interfacial charge transfer provides a plausible explanation for this shift based on the systematic analysis and is therefore a likely contributor to the observed Tc enhancement. First principles calculations elucidate the charge transfer pathways, highlighting the critical role of the interfacial BiTe (BiSe)bilayer. Our results not only provide a tunable TI-SC hybrid system with robust superconductivity at ultrathin thickness, but also offer a potential route for manipulating superconductivity in TI-SC heterostructures via interface engineering. |
| title | Interface-Enhanced Superconductivity in Ultrathin TiN Proximitized by Topological Insulators |
| topic | Materials Science |
| url | https://arxiv.org/abs/2602.23612 |