Video Experimental Relacionado
Updated: Sep 10, 2025
04:51
Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride
Published on: July 8, 2021
2.8K
Correlación entre la superconductividad no convencional y la extraña metalicidad revelada por las mediciones de
Ruozhou Zhang1,2, Mingyang Qin1,3, Chenyuan Li4
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
Science advances
|August 22, 2025
Resumen
El comportamiento de los metales extraños en los superconductores está relacionado con la superconductividad no convencional. Un mecanismo común puede regir la condensación de pares de Cooper y la metalicidad extraña en estos materiales.
Área de la Ciencia:
- Física de la materia condensada
- Ciencias de los materiales
Sus antecedentes:
- El comportamiento del metal extraño se observa en varios superconductores no convencionales, pero su conexión con la superconductividad no está clara.
- Los superconductores a base de hierro como el FeSe exhiben propiedades electrónicas complejas.
Objetivo del estudio:
- Para investigar la relación entre el comportamiento de los metales extraños y la superconductividad en las películas FeSe.
- Para establecer una correlación entre la densidad del superfluido y la resistividad del metal extraño.
Principales métodos:
- Mediciones de densidad de superfluido en películas de FeSe ionizadas.
- El dopaje de electrones para afinar las propiedades superconductoras y extrañas de los metales.
- Cálculos teóricos utilizando el modelo 2D de Yukawa-Sachdev-Ye-Kitaev.
Principales resultados:
- Evolución sincronizada de condensado superconductor y fase de metal extraño con dopaje de electrones.
- Escalado lineal observado entre la densidad de superfluido a temperatura cero y el coeficiente de resistividad de metal extraño.
- Esta escala se mantiene a través de diferentes superconductores basados en hierro y cuprato.
Conclusiones:
- Un mecanismo común probablemente gobierna la condensación de pares de Cooper y la extraña metalicidad en estado normal en superconductores no convencionales.
- Las fluctuaciones críticas cuánticas y el desorden juegan un papel cooperativo en este fenómeno.
Más Videos Relacionados
06:53Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
2.1K
09:06Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
8.2K
Videos de Conceptos Relacionados
01:28Types Of Superconductors
1.1K
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...
1.1K
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
01:17Theory of Metallic Conduction
1.4K
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,...
1.4K
01:31Magnetic Susceptibility and Permeability
1.4K
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...
1.4K
01:31Ferromagnetism
2.5K
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...
2.5K
03:02Colors and Magnetism
12.3K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
12.3K