Nobel Prize: Super Conductor P4

Superconductivity occurs in certain materials at very low temperatures. When superconductive, a material has an electrical resistance of exactly zero. It was discovered by Heike Kamerlingh Onnes in 1911. Like ferromagnetism and atomic spectral lines, superconductivity is a quantum mechanical phenomenon. It is also characterized by a phenomena called the Meissner effect. This is the ejection of any sufficiently weak magnetic field from the interior of the superconductor as it transitions into the superconducting state. The presence of the Meissner effect indicates that superconductivity cannot be understood simply as the idealization of "perfect conductivity" in classical physics.
The electrical resistivity of a metallic conductor decreases gradually as the temperature is lowered. However, in ordinary conductors such as copper and silver, this decrease is limited by impurities and other defects. Even near absolute zero, a real sample of copper shows some resistance. In a superconductor however, despite these imperfections, the resistance drops abruptly to zero when the material is cooled below its critical temperature. An electric current flowing in a loop of superconducting wire can persist indefinitely with no power source.
Superconductivity occurs in many materials: simple elements like tin and aluminium, various metallic alloys and some heavily-doped semiconductors. Superconductivity does not occur in noble metals like gold and silver, nor in pure samples of ferromagnetic metals.
In 1986, it was discovered that some cuprate-perovskite ceramic materials have critical temperatures of more than 90 kelvins. These high-temperature superconductors renewed interest in the topic because (at that time) the current theory could not explain them - they are now well explained by theory. From a practical perspective, 90 kelvins is easy to reach with the readily available liquid nitrogen (boiling point 77 kelvins). This means more experimentation and more commercial applications are feasible, especially if materials with even higher critical temperatures could be discovered.

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[bapeamania231]

smh i wish they gave me phisics in HS .......i understand some of it but the majority is hard cuz i guess there are elementary thing that i needed to b taught.....(What is the name of the video i couldent find it on bt junkie i need to know more)

[KurdstanPlanetarium]

@bapeamania231 I am sure you can find many physics lessons on YT that be suitable for your taste and understanding...just search it on YT

[vmelkon]

isn't it expensive to cool with LN2? It must be.

[KurdstanPlanetarium]

@vmelkon maybe for now, but who knows what the future holds in store!

[ProoMaaaas]

0:27 "One day, who knows, it may happen at room temperature. That would be cool."

No, that wouldn't be cool, that would be hot ;D.

[kght222]

@bapeamania231 i apologize for how this might sound, but friend if you want to learn about such things, try to use a language first, not half of one. and a good place on youtube to learn some basic physics are; The Periodic Table of Videos, Sixty Symbols, and Test Tube. lots of other places but those 3 are from a real school (and cover more than just physics)

[luis5137]

so what is so important about the supercontuctor is sweden???

[luis5137]

so what is so important about the supercontuctor is sweden???

[nickharvey7]

Interesting and a good set of video!!!