超导性在一个呼吸的kagome金属ROs (R = Sc, Y, Lu) 中
Karolina Górnicka1,2,3, Michał J Winiarski1,2, Dorota I Walicka3
1Faculty of Applied Physics and Mathematics, Gdansk University of Technology, Ul. Narutowicza 11/12, 80-233, Gdańsk, Poland.
Scientific reports
|October 4, 2023
概括
我们合成了三种基于的Laves化合物 (ScOs2,YOs2,LuOs2),发现它们是散装超导体. 这些六角形材料表现出kagome金属的特性,为超导性研究提供了新的途径.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 超导电性 超导电性 超导电性
背景情况:
- 基于的拉维斯相因其独特的结构和电子特性而引起人们的兴趣.
- 了解晶体结构,电子带结构和超导之间的关系至关重要.
研究的目的:
- 为了合成和表征新的基于的六边形拉维斯化合物ROS2 (R = Sc,Y,Lu).
- 为了研究它们的物理特性,包括超导性.
- 使用密度函数理论 (DFT) 计算来探索电子结构.
主要方法:
- 合成ROS2的化合物.
- 粉末X射线衍射 (pXRD) 用LeBail精细化进行结构分析.
- 取决于温度的磁性易感性,电阻性和热容量测量.
- 密度函数理论 (DFT) 计算用于电子带结构分析.
主要成果:
- 成功合成了ScOs2,YOs2和LuOs2,所有这些都结晶成六角MgZn2型结构.
- 在5.36K (ScOs2),4.55K (YOs2) 和3.47K (LuOs2) 的临界温度 (Tc) 时,批量超导的确认.
- 这些化合物的识别为弱合型II超导体.
- DFT计算揭示了复杂的带结构, kagome衍生带影响了超导.
结论:
- 合成的ROS2化合物是六角形的拉维斯相超导体.
- 这些材料可以归类为呼吸的kagome金属超导体.
- 卡戈梅晶格结构和电子相互作用之间的相互作用驱动着它们的超导特性.
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