在超导FeS中出现的磁性秩序是由Crdoping诱导的
Yangzhou Wang1, Qianshuo Wang1, Yanhao Dong1
1Materials Genome Institute, Shanghai University, Shanghai 200444, China.
Materials (Basel, Switzerland)
|May 14, 2025
概括
在硫化铁 (FeS) 中使用诱导磁性秩序,允许超导性 (SC) 和磁性秩序 (MO) 的共存. 这种电子状态的调整为控制铁基超导体集体订单提供了一种新方法.
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:
- 铁硫化 (FeS) 呈现多带,节点类型的超导性 (SC),具有s- + d波配对对称性.
- 在FeS中低时刻无序的静态磁性表明磁性顺序 (MO) 与SC的潜在共存.
- 了解电子相关性和磁相互作用是新型超导状态的关键.
研究的目的:
- 为了研究 (Cr) 兴奋剂对四角 FeS.电子和磁性特性的影响.
- 探索诱导和控制超导和磁性秩序共存的可能性.
- 建立一个相位图,说明Cr兴奋剂,磁性转换和SC之间的相互作用.
主要方法:
- 密度函数理论 (DFT) 计算来预测Cr诱导的电子和磁变化.
- 试验合成Cr替代的四角形FeS单晶.
- 测量磁转换和超导特性,包括异性质.
主要成果:
- 在Cr兴奋剂诱导显著的d轨道重建和局部磁矩 (~2.4μB) 在兴奋剂的网站.
- 通过实验观察到一个清晰的磁过渡和减少的SC异构性.
- 在较低的Cr兴奋剂水平 (低于0.05) 上,超导性仍然存在,这表明SC和MO的共存.
- 通过交换合推断了Cr剂和FeS宿主之间的强烈旋转相关性.
结论:
- 替代Cr注是一种有效的方法来调整电子配置,并调节FeS中的SC基态.
- 局部时刻的连续注入提供了一个可控制的路线来操纵铁基超导体中的集体订单.
- 观察到的SC和MO的共存凸显了这些材料中旋转相关性的重要性.
更多相关视频
09:06Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
8.0K
08:55Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
8.4K
相关概念视频
Ferromagnetism
2.4K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.4K
Types Of Superconductors
887
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...
887
Magnetic Susceptibility and Permeability
868
In linear magnetic materials, like paramagnets and diamagnets, magnetization is proportional to the magnetic field intensity. The constant of proportionality, a dimensionless number, is called magnetic susceptibility. The value of the susceptibility depends on the type of material.
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
868
Diamagnetism
2.4K
Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
2.4K
Superconductor
1.0K
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...
1.0K
Paramagnetism
2.5K
Paramagnets are materials with unpaired electrons that possess a finite magnetic moment. In the absence of a magnetic field, these moments are randomly oriented, and thus the net moment is zero. Under an external field, a torque acting on the moments tends to align them along the field's direction. However, the random thermal motion of electrons produces a torque opposite to the external field and tries to disorient the moments. These two competing effects align only a few moments along the...
2.5K
