传输相图和超导无限层尼基酸盐中的异常金属性
Yu-Te Hsu1,2,3, Kyuho Lee4,5, Sven Badoux6,7
1High Field Magnet Laboratory (HFML-FELIX) and Institute for Molecules and Materials, Radboud University, Toernooiveld 7, 6525 ED, Nijmegen, Netherlands. ythsu@phys.nthu.edu.tw.
Nature communications
|November 14, 2024
概括
高温超导体,无限层尼基酸盐 (ILN) 和酸盐具有相似之处. 这项研究揭示了ILN中的非费米液态行为,这表明尽管电荷动态不同,但共享量子临界阶段.
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
- 量子材料是一种量子材料.
背景情况:
- 高温酸盐和无限层酸盐 (ILN) 具有相似的电子和晶体结构.
- 最近的研究表明,ILN具有超导圆顶和正常状态传输特性,与酸盐相似.
- 在磁场下ILN的正常状态行为在很大程度上仍未被探索.
研究的目的:
- 为了研究无限层尼基酸盐 (ILN) 在低温极限中的磁传输特性.
- 为了确定ILN在其相位图上的正常状态行为,特别是在磁场下.
- 为了比较ILN与cuprates的量子关键行为.
主要方法:
- 新一代Nd1-xSrxNiO2薄膜的制造.
- 在高达54特斯拉的磁场中测量磁传输特性.
- 在T → 0极限中分析电阻和电磁阻.
主要成果:
- 无限层酸盐 (ILN) 在它们的正常状态电阻中表现出非费米液态的行为,在超导圆顶内的扩展的兴奋剂范围内.
- 这种非费米流体的行为发生在很大程度上,而不是在一个单一的量子临界点.
- 虽然电荷动态和磁阻在ILN和酸盐之间有所不同,但两者都显示出异常的金属性,表明量子关键阶段.
结论:
- ILN的正常状态电阻表现出非费米液体特征,暗示量子临界阶段.
- 尽管电荷动态有差异,但ILN和cuprates具有异常的金属性,这表明它们具有共同的基础物理.
- 这项研究加深了对强烈相关的电子系统中量子关键性的理解.
相关概念视频
01:28Types Of Superconductors
941
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...
941
01:24Superconductor
1.1K
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...
1.1K
01:17Theory of Metallic Conduction
1.3K
The conduction of free electrons inside a conductor is best described by quantum mechanics. However, a classical model makes predictions close to the results of quantum mechanics. It is called the theory of metallic conduction.
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...
1.3K
02:37Metallic Solids
18.3K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
18.3K
02:32Bonding in Metals
46.9K
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.
46.9K
01:31Ferromagnetism
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