Video Experimental Relacionado
Updated: May 7, 2026
09:00
Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
Superconductividad en el piceno dopado con metales alcalinos
Ryoji Mitsuhashi1, Yuta Suzuki, Yusuke Yamanari
1Research Laboratory for Surface Science, Okayama University, Okayama 700-8530, Japan.
Nature
|March 6, 2010
Resumen
Los investigadores descubrieron superconductividad en el piceno intercalado con potasio (K(x) piceno), un hidrocarburo sólido. Este avance ofrece prometedores candidatos de hidrocarburos orgánicos para lograr temperaturas de transición superconductoras más altas (T ((c)).
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Física de la materia condensada Física de la materia condensada
- Química orgánica es la química orgánica.
Sus antecedentes:
- Los materiales superconductores son cruciales para el avance científico y las aplicaciones tecnológicas.
- Descubrimientos recientes incluyen grafito intercalado con calcio, diamante dopado con boro y arseniuros de hierro.
- En la última década no ha surgido ningún nuevo superconductor orgánico con una alta temperatura de transición (Tc).
Objetivo del estudio:
- Para explorar nuevos sistemas de materiales superconductores.
- Investigar el potencial de los hidrocarburos orgánicos como superconductores.
- Identificar nuevos materiales orgánicos con altas temperaturas de transición superconductoras.
Principales métodos:
- Intercalación de metales alcalinos en piceno, un hidrocarburo sólido.
- Medición de las temperaturas de transición superconductoras (T ((c)) en el piceno intercalado con potasio (K ((x)) piceno).
- Análisis de las gotas de magnetización para determinar la nitidez de la transición superconductora.
Principales resultados:
- El comportamiento metálico y la superconductividad fueron inducidos en piceno por la intercalación de metales alcalinos.
- El piceno intercalado con potasio (K(x) piceno) exhibió valores de T(c) de 7 K y 18 K, dependiendo del contenido de metal.
- Se observó una transición magnética aguda (<2 K), similar al grafito intercalado con calcio.
Conclusiones:
- Los hidrocarburos orgánicos, específicamente el K (((x) piceno, son candidatos viables para nuevos materiales superconductores.
- El descubrimiento abre caminos para el desarrollo de superconductores orgánicos con valores de T (c) mejorados.
- Esta investigación pone de relieve el potencial de los sólidos orgánicos intercalados en la física de la materia condensada.
Videos de Conceptos Relacionados
03:06Alkali Metals
Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
Table 1: Properties of the alkali metals
02:47Structure and Bonding of Alkenes
Olefins, which are unsaturated hydrocarbons containing one or more carbon–carbon double bonds, are broadly divided into alkenes and cycloalkenes. The general chemical formula of an alkene is CnH2n.
Doubly bonded carbons are sp2 hybridized and have a trigonal planar geometry. The double bond is composed of a σ bond formed by the overlap of hybrid orbitals and a π bond produced by the lateral overlap of unhybridized 2p orbitals on both the carbons. Each carbon atom is bonded to two hydrogen atoms...
Doubly bonded carbons are sp2 hybridized and have a trigonal planar geometry. The double bond is composed of a σ bond formed by the overlap of hybrid orbitals and a π bond produced by the lateral overlap of unhybridized 2p orbitals on both the carbons. Each carbon atom is bonded to two hydrogen atoms...
01:27π Electron Effects on Chemical Shift: Overview
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0, resulting in...
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...