Room-temperature growth of superconducting β-Bi 2 Pd thin films

作者：Kwan Chun Wong, Pengcheng Wang, Kai Ham Yu, Chow Lam, XIAOYING XU, Yufan Li · 发表于：Applied Physics Express · 年份：2026 · DOI：10.35848/1882-0786/ae9f13 · 研究领域：Physics of Superconductivity and Magnetism、Topological Materials and Phenomena、Surface and Thin Film Phenomena

Abstract Superconducting β-Bi 2 Pd has attracted considerable interest as a candidate topological superconductor and a platform for investigating unconventional superconductivity. However, previously reported growth procedures commonly employ elevated substrate temperatures or post-growth annealing, which can restrict integration with temperature-sensitive materials and pre-patterned structures. Here, we demonstrate room-temperature magnetron co-sputtering of phase-pure, (001)-textured β-Bi 2 Pd films on amorphous and crystalline substrates. Epitaxial films are further realized by depositing β-Bi 2 Pd at room temperature on a thin epitaxial seed layer formed at elevated temperature. These results establish a low-thermal-budget route for integrating superconducting β-Bi 2 Pd into superconducting heterostructures and hybrid quantum devices.