SQUIDs - Low Temperature Laboratory
SQUIDs - Low Temperature Laboratory
SQUIDs - Low Temperature Laboratory
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Normal Metals vs. Superconductors<br />
Normal Metals Superconductors : BCS Theory<br />
Electron has charge -e<br />
I I<br />
Scattering of electrons produces resistance.<br />
A current generates a voltage, and hence<br />
causes dissipation.<br />
Electrons are paired together :<br />
these Cooper pairs have charges -2e<br />
I I<br />
Cooper pairs carry a supercurrent which<br />
encounters no resistance.<br />
A supercurrent generates no voltage, and<br />
hence causes no dissipation.
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