Superconductivity at Pd/Bi2Se3 Interfaces Due to Self-Formed PdBiSe Interlayers

Kaixuan Fan, Ze Hua, Siyao Gu, Peng Zhu, Guangtong Liu, Hechen Ren, Ruiwen Shao*, Zhiwei Wang*, Li Lu, Fan Yang*

*此作品的通讯作者

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摘要

Understanding the physical and chemical processes at the interfaces of metals and topological insulators is crucial for the development of the next generation of topological quantum devices. Here, we report the discovery of robust superconductivity in Pd/Bi2Se3 bilayers fabricated by sputtering Pd on the surface of Bi2Se3. Through transmission electron microscopy measurements, we identify that the observed interfacial superconductivity originates from the diffusion of Pd into Bi2Se3. In the diffusion region, Pd chemically reacts with Bi2Se3 and forms a layer of PdBiSe, a known superconductor with a bulk transition temperature of 1.5 K. Our work provides a method for the introduction of superconductivity into Bi2Se3, laying the foundation for the development of sophisticated Bi2Se3-based topological devices.

源语言英语
文章编号5460
期刊Materials
17
22
DOI
出版状态已出版 - 11月 2024

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