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I think I have a picture now of how
applying the BCS theory describes the superconductivity of YBCO.
http://230nsc1.phy-astr.gsu.edu/hbase/solids/coop.html
Considering the concept of Cooper Pairs described in the
former link, the YBCO superconductor as shown in the next link is made up
of two solid planes (chiefly composed of Copper Oxide,) that support the lattice
of (positively charged) Yttrium ions that supports Cooper Pair
formation.
http://230nsc1.phy-astr.gsu.edu/hbase/solids/hitc.html#c3
(That is of course presuming that Cooper Pairs are responsible
for superconduction rather that some nucleon effect.)
If this is true then this model describes:1) The two
elements to a high temperature super conductor are, a) A
structure to support a positive ion lattice, b) The
positive ion lattice. 2) The temperature of the Tc for a
superconductor is dictated by, a) The stability provided
by lattice support structures, b) The mass of the ions
composing the lattice, c) The lattice pattern and
separation distance of the lattice ions.
A superconductor might be fabricated from a spiral or
cylindrical polymer where that spiral or cylinder is used to sheath and support
lattice strings of positive ions. Probably the best shape for the
cross-section of the cylinder or spiral would be a star although an ellipse
would probably do ok. Such a fiber structure would probably be more
flexible (and less brittle) than the planar structure of the
ceramics.
The next link describes fabrication of flexible
superconductors based on YBCO and possibly demonstrated the portability of the
Yttrium lattice. When YBCO is put in a silver cylinder and that cylinder
is drawn into a thin wire, the superconduction is found to only occur at a plane
near the silver sheath. In answer to this the researcher placed a silver
wire core into the cylinder before pouring in the YBCO powder and drawing the
wire which formed another plane of superconduction this time near the core
silver wire. http://230nsc1.phy-astr.gsu.edu/hbase/solids/scex2.html#c5
The ceramic disk fabricated by Podkletnov forced the composite
planes of superconduction into a relatively flat plane perpendicular to the
disk's axis. Fabrication of polymer superconductors may not only make such
an planar orientation easer to produce but may also yield room temperature
superconductors by virtue of more accurately spaced ion
lattices.
Introduction to Organic Metals
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