立体测量三度超化物LaBeH_{8}作为一个新模板,用于80GPa以下的110K高温超导
Yinggang Song1, Jingkai Bi1, Yuki Nakamoto2
1Key Laboratory of Material Simulation Methods and Software of Ministry of Education, College of Physics, Jilin University, Changchun 130012, China.
Physical review letters
|July 14, 2023
概括
研究人员合成了一种新的三元超化物LaBeH,在80GPa时表现出高达110K的超导性. 这一发现标志着第一个具有明确晶体结构的三元化合物,为新的高温超导体铺平了道路.
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:
- 对于高温超导体的研究已经转向三元化合物.
- 在较低的压力下合成具有稳定结构的三元超化物仍然是一个挑战.
研究的目的:
- 为了合成和描述一种新的三元超化物.
- 为了研究其在高压下超导特性.
主要方法:
- 使用钻石天细胞 (110-130 GPa) 的高压合成.
- 用X射线衍射来确定晶体结构.
- 运输测量以评估电阻和超导.
主要成果:
- 成功合成了具有岩盐样结构的三元LaBeH_{8}.
- 在80 GPa时,在至高于110 K的临界温度 (T_{c}) 上观察超导.
- 通过零电阻和磁场依赖的T_{c}转移确认超导性.
结论:
- LaBeH_{8}是第一个三元超化物,其结晶结构具有高温超导性.
- 这一发现扩大了发现新的超化物的结构格局.
- 为合理设计具有增强超导性能的材料开辟了道路.
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