Superconducting properties of copper oxide high - temperature

The equations for the magnon pairing theory of high-temperature copper-oxide-based superconductors are solved and used to calculate several properties, leading to results for specific heat and critical magnetic fields consistent with experimental results. In addition, the theory suggests an explanation of why there are two sets of transition temperatures (T, 90 K and Tc 55 K) for the YBa2Cu306+, class of superconductors. It also provides an explanation of why La2zSr.CuO4 is a superconductor for only a small range of x (and suggests an experiment to independently test the theory). These results provide support for the magnon pairing theory of high-temperature superconductors. On the basis of the theory, some suggestions are made for improving these materials. We recently proposed the magnon pairing mechanism (1) to explain the high-temperature superconductivity in ceramic copper oxide superconductors (2-4). This model was derived from the results of generalized valence bond (GVB) calculations (5) and was used to predict some qualitative features of these systems. With the magnon pairing mechanism (1) we have now calculated several properties of the superconducting phase. The results on specific heat, critical magnetic fields, Hall effect, penetration depth, coherence length, and dependence upon doping generally agree with experiment and, in some cases, explain rather puzzling results. Several predictions are made that could be tested with further experiments.