Video Experimental Relacionado
Updated: Jul 12, 2026
04:51
Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride
Published on: July 8, 2021
Química de los superconductores de alta temperatura y sus componentes
Science (New York, N.Y.)
|December 23, 1988
Resumen
Los avances recientes han avanzado significativamente los superconductores, con la temperatura crítica que se eleva a 122 K. Este emocionante desarrollo en los superconductores de óxido abre las puertas a nuevas aplicaciones.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Física de la materia condensada Física de la materia condensada
Sus antecedentes:
- La superconductividad, el fenómeno de resistencia eléctrica cero, se ha observado históricamente a temperaturas muy bajas.
- Los últimos años han sido testigos de un progreso notable en el campo de la superconductividad, particularmente con materiales de óxido.
Objetivo del estudio:
- Para resaltar los avances significativos en las temperaturas críticas de los superconductores.
- Para discutir el papel de los materiales de óxido específicos en el logro de temperaturas superconductoras más altas.
- Para subrayar las aplicaciones potenciales y la intriga científica de los superconductores de alta temperatura.
Principales métodos:
- Revisión de hallazgos experimentales recientes en la investigación de la superconductividad.
- Análisis de la composición química de los óxidos superconductores recién descubiertos.
- Comparación de las temperaturas críticas en diferentes clases de superconductores.
Principales resultados:
- La temperatura crítica superior para la superconductividad ha aumentado dramáticamente de 23 K a 122 K.
- Los materiales de óxido, especialmente los que contienen láminas de cobre-oxígeno, son fundamentales para estos superconductores de alta temperatura.
- Elementos como el bismuto y el talio son cruciales en esta nueva clase de compuestos superconductores.
Conclusiones:
- El progreso en curso sugiere que incluso temperaturas superconductoras más altas pueden ser alcanzables.
- Los superconductores de alta temperatura ofrecen un potencial transformador en diversas aplicaciones tecnológicas.
- La ciencia subyacente de estos nuevos superconductores de óxido presenta un área fascinante para la investigación continua.
Videos de Conceptos Relacionados
01:24Superconductor
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...
01:28Types Of Superconductors
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...
02:32Bonding in Metals
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”.
01:17Theory of Metallic Conduction
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,...
01:18Fermi Level
The Fermi-Dirac function is represented by an S-shaped curve indicating the probability of an energy state being occupied by an electron at a given temperature. The Fermi level is the energy level at which there is a fifty percent chance of finding an electron, and it is positioned between the lower-energy valence band and the higher-energy conduction band.
At absolute zero temperature, electrons fill all energy states up to the Fermi level, leaving upper states empty. As the temperature rises,...
At absolute zero temperature, electrons fill all energy states up to the Fermi level, leaving upper states empty. As the temperature rises,...
01:27Atomic Spectroscopy: Effects of Temperature
Atomization, converting samples into gas-phase atoms and ions, is essential for atomic spectroscopy. The flame temperature required for atomization affects the efficiency of the atomic spectroscopic methods by increasing the atomization efficiency and the relative population of the excited and ground states.
At thermal equilibrium, the relative populations of excited and ground state atoms can be estimated using the Maxwell–Boltzmann distribution. For example, an increase in temperature from...
At thermal equilibrium, the relative populations of excited and ground state atoms can be estimated using the Maxwell–Boltzmann distribution. For example, an increase in temperature from...