# Tag Info

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The attraction does happen at all temperature, but it is negligible if the temperature is too high. So the electrons do attract each other, but the thermal fluctuations do not allow for Cooper pairs to be stable. To give an heuristic example : Imagine a lot of hydrogen atoms. The electrons are bound to their protons at zero temperature. If now you put the ...

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The best way is to use the inverse value, the compressibility, this one is more easilly found.

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A Google books search for "bulk modulus of liquid helium" turned up this result: Helium, edited by Paul Muljadi. On page 7, you will find the value of the bulk modulus as on the order 50 MPa. There is a reference linked to this value, but it is not part of the free preview, so I cannot tell you what it is.

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Think of the superconducting order parameter as given by the minimum of the Ginzburg-Landau functional: \mathscr{F}=\mathscr{F}_{N}+\int ...

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Here you have a list of non-oxygen containing 4-element pnictides. It might not be a thorough list, but it might help.

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A "new" state of matter comes into being, when one (or more) scientist discovers it and "enough" other scientists agree/accept, that it IS!

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As said in the comments, this is a very broad question, so instead of writing a very long post, I point you to a good article titled "Superconductivity and the environment: a Roadmap": http://iopscience.iop.org/0953-2048/26/11/113001 . The article lists a lot of emerging technologies that make use of superconductors. The applications of room temperature ...

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Broadly, all the applications of regular SCs, without the same cooling requirements. Some popular ones include power distribution (power lines), power generation/conversion (generators/motors), fusion, "portable" MRI, sensors, electromagnetic anything... etc. The list goes on and on. It would probably be limited only by cost.

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As superconductors have zero resistance a large amount of Eddy current flows in them. These eddy currents will generate a magnetic field opposite to that due to the magnet and the repulsion between these magnetic fields is what causes the magnet to levitate. It is not that it should be a permanent magnet. Levitation works with those which produce a ...

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