112型Ca1-xLaxFeAs2中砷锯齿链的锑定点掺杂
Site-Selective Antimony Doping in Arsenic Zigzag Chains of 112-type Ca1-xLaxFeAs2
摘要：
用X射线单晶衍射方法研究了Sb掺杂的112型铁基超导体Ca 1-xLaxFeAs 2的超导转变温度Tc为47 K。掺杂的Sb优选不取代FeAs层中的As（1），而是取代As之字形链层中的As（2）。讨论了Sb掺杂提高Tc的结构原因。
英文摘要：
Single crystal X-ray diffraction studies were performed for the Sb-doped 112-type iron-based superconductor Ca1-xLaxFeAs2 with the superconducting transition temperature Tc of 47 K. Doped Sb preferably substituted not for As(1) in the FeAs layers but for As(2) in the layers of As zigzag chains. Structural reasons for Tc enhancement by Sb doping were discussed.
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