I have fabricated what I believe to be a copper(Cu) based Swedenborgite. Its structure is analogous to the cobalt(Co) based Swedenborgite, YBaCo4O7+d. The material would be comprised of CuO4 tetrahedra which form alternating kagome and triangular lattices. The Co based Swedenborgites are p-type conductors and geometrically frustrated antiferromagnets that can be hole-doped. I am trying to do the same to a Cu based version, but with a twist. Such a material should superconduct. I have fabricated a sample, but am trying to have it tested. I have thought about putting the formula out there for anyone interested in trying something new. This is especially timely, because CuO4 tetrahedra are reminiscent of the FeAs4 tetrahedra found in the Fe-based superconductors.
it looks definitely interesting, especially if the structure and cation arrangement is confirmed. Yes the material is likely to superconduct. Sure that you are also not locally forming the YBCO structure ? (they are chemically very close, albeit the difference between layered perovskite and swedeborgite structures)
The structure is definitely not the YBCO structure. I tried fabricating YBaCu4O7 and got a bluish-gray melt. I made a calculated substitution and produced a uniform, black powder after making the switch(at the same sintering temp). I've filed a Provisional Patent Application for a possible new family of "Swedenborgite Superconductors." I just need someone to either fabricate their own sample(using my formula) and test it or someone that will test the sample that I have already prepared. I can post the formula here for anyone that would be interested in trying it.
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