Superconducting PdTe Thin Film Via Topotactic Transformation, Toward Topological Superconductors
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arXiv
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| Auteurs principaux: | , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866910239144542208 |
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| author | Yi, Hee Taek Ge, Min Xie, Renjie Stoddard, Colby J. Yi, David H. Yuan, Xiaoyu Yao, Xiong Oh, Seongshik |
| author_facet | Yi, Hee Taek Ge, Min Xie, Renjie Stoddard, Colby J. Yi, David H. Yuan, Xiaoyu Yao, Xiong Oh, Seongshik |
| contents | Topological superconductors (TSCs) hosting Majorana zero modes (MZMs) offer a pathway to fault-tolerant quantum computation. PdTe is a promising TSC candidate due to its topological surface states and a reasonable superconducting critical temperature of ~4.5 K. However, it has been challenging to grow PdTe thin films with bulk-like superconducting properties. Here, we show that high-quality, superconducting PdTe thin films can be grown using molecular beam epitaxy (MBE). The films exhibit a sharp superconducting transition (T_onset = 4.43 K with transition width of 0.06 K), comparable to that of bulk crystals. This was made possible via a topotactic transformation from a PdTe_2 buffer layer to a PdTe phase by growing Pd on top under Te-deficient conditions. Structural and transport analyses confirm the NiAs-type structure of PdTe, as well as its two-dimensional superconducting behavior and excellent air stability. These findings suggest that the MBE-grown PdTe films and their heterostructures are a promising platform for topological superconductivity and Majorana physics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_20437 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Superconducting PdTe Thin Film Via Topotactic Transformation, Toward Topological Superconductors Yi, Hee Taek Ge, Min Xie, Renjie Stoddard, Colby J. Yi, David H. Yuan, Xiaoyu Yao, Xiong Oh, Seongshik Superconductivity Materials Science Topological superconductors (TSCs) hosting Majorana zero modes (MZMs) offer a pathway to fault-tolerant quantum computation. PdTe is a promising TSC candidate due to its topological surface states and a reasonable superconducting critical temperature of ~4.5 K. However, it has been challenging to grow PdTe thin films with bulk-like superconducting properties. Here, we show that high-quality, superconducting PdTe thin films can be grown using molecular beam epitaxy (MBE). The films exhibit a sharp superconducting transition (T_onset = 4.43 K with transition width of 0.06 K), comparable to that of bulk crystals. This was made possible via a topotactic transformation from a PdTe_2 buffer layer to a PdTe phase by growing Pd on top under Te-deficient conditions. Structural and transport analyses confirm the NiAs-type structure of PdTe, as well as its two-dimensional superconducting behavior and excellent air stability. These findings suggest that the MBE-grown PdTe films and their heterostructures are a promising platform for topological superconductivity and Majorana physics. |
| title | Superconducting PdTe Thin Film Via Topotactic Transformation, Toward Topological Superconductors |
| topic | Superconductivity Materials Science |
| url | https://arxiv.org/abs/2605.20437 |