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Electronic structures of REBaCuO (RE=La, Pr, Nd, Sm, Gd, Dy, Ho and Er) systems were calculated by meansof SCF-Xα -SW methods. Results show that there is an inner-orbit coupling for these oxide superconductor systems. Theinner-orbit coupling was resulted from the interaction of two electronic orbits of RE 5p and O 2s, since they have similarenergy state levels and relatively larger orbital electronic clouds. Compared with experimental facts, it is also found that theoverlap in space between the two orbits has a similar tendency to Tc and the number of enrolling electrons has a close rela-tion to Jc, therefore, the influence of inner-orbit coupling on superconductivity could not be overlooked.
Electronic structures of REBaCuO (RE = La, Pr, Nd, Sm, Gd, Dy, Ho and Er) systems were calculated by means of SCF-Xα -SW methods. Results show that there is an inner- orbit coupling for these oxide superconductor systems Compared to two electrons orbits of RE 5p and O 2s, since they have similarenergy state levels and relatively larger orbital electronic clouds. Compared with experimental facts, it is also found that the overlap in space between the two orbits has a similar tendency to Tc and the number of enrolling electrons has a close rela tion to Jc, therefore, the influence of inner-orbit coupling on superconductivity could not be overlooked.