

Lead zirconate titanate (PZT)  (Source: DIY Trade)
University research report observing high conductivity using surprisingly simple metal mix





The paper involved can be found here.





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RE: Hippo.
By Goty on 7/28/2010 1:30:25 PM , Rating: 5
If the arrangement of materials conducts with no resistance across the interface, then it is a superconductor.

It doesn't matter that this is a layered material instead of a doped material (as most superconductors are today), it is the behavior that makes it a superconductor, not the structure.

RE: Hippo.
By 3DoubleD on 7/28/2010 6:50:11 PM , Rating: 2
Firstly, the band structures of the metals have no bearing on the superconductivity of a material. Superconductivity is due to the interaction between electrons and phonons (lattice vibrations). An electron traveling through a superconductor will interact with the lattice and the corresponding phonon will link another electron to the first. The pairing of the two electrons (which are fermions), will create a boson. Bosons behave very differently than fermions, and the band structure of a given material becomes completely irrelevant at this point.

Secondly, a 4 point probe measurement of the sample involves contacting the SURFACE in 4 places. If the surface is aluminum or silver, then it would seem likely that is where the current will flow through as the field lines will be between the probes, not across the interface.

Finally, I agree that if there is zero resistance, it's a superconductor. I was merely expressing my doubt that the measurement was correct on the basis that their "superconductor" material is outside the regular definition. But, I'd love to be proven wrong! Bring on the superconducting revolution!

RE: Hippo.
Congratulations, you have access to the internet!

RE: Hippo.

If you'd like to read up on the subject:

RE: Hippo.


RE: Hippo.

