New Superconducting Lead Cuprates Prepared
by Molecular Beam Epitaxy
The crystal structure of superconducting
copper oxides (CuO2) can be simply viewed as the stacking of
two-dimensional CuO2 planes and a charge reservoir block (C.R.B.).
The search for new superconductors is, in
other words, the search for new charge reservoir
blocks. We have succeeded in synthesizing
a new superconducting cuprate PbSr2CuO5 with a pure PbO charge reservoir block using
molecular beam epitaxy (MBE). This superconductor
is thermodynamically quasi-stable and cannot
be obtained by bulk synthesis.
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