The Nature of the Cooper Pair - University of Liverpool
The Nature of the Cooper Pair - University of Liverpool
The Nature of the Cooper Pair - University of Liverpool
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V/N would be <strong>the</strong> volume associated with one electron, or ion,<br />
and this is <strong>of</strong> <strong>the</strong> order d 3 . Substituting <strong>the</strong>se, we find<br />
� 2π<br />
λ F<br />
� 2<br />
=<br />
Solving for <strong>the</strong> wavelength gives<br />
� �<br />
3π2 2/3<br />
d 3<br />
λ F ≈ 2d.<br />
Since <strong>the</strong> distance between <strong>the</strong> paths <strong>of</strong> <strong>the</strong> two electrons is<br />
smaller than λ F , because both must be roughly in between <strong>the</strong><br />
same pair <strong>of</strong> ions, we may assume that <strong>the</strong> angular momentum<br />
is zero.<br />
To see this, ...<br />
Superconductivity 15<br />
.
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