While the family of layered pnictides ABX₂ (A—rare or alkaline earth metals, B—transition metals, and X—Sb/Bi) can host Dirac dispersions based on Sb/Bi square nets, nearly half of them have not yet been synthesized for possible combinations of the A and B cations. Here, we report the fabrication of EuCdSb₂ with the largest B-site ionic radius, which is stabilized for the first time in thin film form by molecular beam deposition. EuCdSb₂ crystallizes in an orthorhombic Pnma structure and exhibits antiferromagnetic ordering of the Eu magnetic moments at T_N = 15 K. Our successful growth will be an important step for further exploring novel Dirac materials using film techniques.

中文翻译：

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具有扭曲 Sb 方网的新型层状 pnictide 的分子束沉积

虽然层状 pnictides ABX ₂（A -稀有或碱土金属、B -过渡金属和X -Sb/Bi）家族可以承载基于 Sb/Bi 方网的狄拉克分散体，但其中近一半尚未合成对于A和B阳离子的可能组合。在这里，我们报告了具有最大B位离子半径的 EuCdSb ₂的制造，该半径首次通过分子束沉积以薄膜形式稳定下来。EuCdSb ₂以正交Pnma结构结晶，并表现出T处 Eu 磁矩的反铁磁排序_N = 15K。我们的成功成长将是使用薄膜技术进一步探索新型Dirac材料的重要一步。