发现了一种超导体Bi5 O4 S3 Cl含有独特的BiS3层
Yaling Yang1,2, Xiao Fan1,2, Jiali Liu1,2
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|August 27, 2023
概括
研究人员发现了一种新的基于BiS的超导体Bi5O4S3Cl,其超导率高于3K.引入硫空缺将半导体母相转化为金属状态,这表明了新的超导体开发的途径.
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
- 固态化学 固态化学
背景情况:
- 基于BiS2的分层超导体,结构上类似于铜酸和铁基超导体,是研究感兴趣的重要领域.
- 对新型分层材料的探索对于推进超导科学至关重要.
研究的目的:
- 报告一种新的四级化合物Bi5O4S3Cl.Cl的合成和表征.
- 为了研究这种新型材料的超导特性.
- 阐明其观察到的超导性背后的潜在机制.
主要方法:
- 结晶结构的确定:四角形结构,P4/mmm空间组.
- 超导体的表征:电传输和磁性测量.
- 电荷载体分析:霍尔电阻测量.
- 理论调查:第一原则计算.
主要成果:
- Bi5O4S3Cl表现出3K以上的超导过渡.
- 霍尔电阻测量表明多带特征具有类似电子的电荷载体.
- 第一原则计算显示,硫空位会在半导体母相中诱导金属状态.
结论:
- 新合成的Bi5O4S3Cl是一种超导体,有可能进一步研究.
- 引入硫空缺似乎是实现该系统中超导性的关键.
- 这些发现为发现新的基于BiS的超导体提供了灵感.
更多相关视频
04:51Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride
Published on: July 8, 2021
2.8K
06:49Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates
Published on: April 12, 2019
7.7K
相关概念视频
01:24Superconductor
1.2K
A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
1.2K
01:28Types Of Superconductors
1.0K
A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
1.0K