Superconductivity and electron pair

[kthouz]

Hi all!
I am learning superconductivity for the first time. As i saw, the supercurrent of some material is governed mainly by electron pair!
Now my question raises here, how do those electron pairs form? What are their features compared to single electrons?

Here is what i guess: "at very low temperature (T <Tc), the valence shell is fully filled and no electron can have enough thermal energy to make it excited up to the conduction band. And according to Pauli principle, the number of possible electrons that can live together with opposite spins is limited to 2. Now i guess that the conduction (supercurrent) is driven by these pairs of electrons that are bound together and hence the conduction is within the valence band. what do you think?"
Please, i need your help to understand.

 

[ZapperZ]

You are essentially asking us to teach you about Cooper Pairing, which isn't going to be easy on a forum like this. I would suggest you do some preliminary reading first, and then come back and see if you have other issues that you don't understand.

Start with this:

http://hyperphysics.phy-astr.gsu.edu/hbase/solids/coop.html

Zz.

 

[granpa]

before studying cooper pairs you should start with:
http://en.wikipedia.org/wiki/Electron_pair
http://en.wikipedia.org/wiki/Lone_pair

these pairs are responsible for the unusual properties of noble gases and fluorocarbons