Bosons & superconductors

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Offline DoctorBeaver

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Bosons & superconductors
« on: 19/08/2007 12:38:27 »
I just read that superconductors can be made from bosons.

I thought bosons were mediators of forces and could not form ordinary matter; so how can they be formed into superconductors?  [???]
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another_someone

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Bosons & superconductors
« Reply #1 on: 19/08/2007 18:19:29 »
As I understand it, superconductors must be made from bosons, but they are not single particle bosons.

The difference between a boson and a fermion is whether the particle has a half integer spin, or an integer spin.  What generally happens in superconductors is that fermions are paired up so that their combined half integer spins make up an integer spin pseudo particle, and so in combination they behave as a boson.

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Offline DoctorBeaver

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Bosons & superconductors
« Reply #2 on: 19/08/2007 18:22:40 »
Ah - 1 of the articles I was reading mentioned pseudo-spin.
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