In high temperature oxide superconductors, such as Sr-La-Cu-O,Ba-Y-Cu-O, there is a phase transition from semiconductor to metal as the composition changes under the same condition of heat treatment. Recently the theo...In high temperature oxide superconductors, such as Sr-La-Cu-O,Ba-Y-Cu-O, there is a phase transition from semiconductor to metal as the composition changes under the same condition of heat treatment. Recently the theoretical explanations are proposed, hut the research is still at an initial stage. Thus study in different ways on the cause of the phase transition and its relationship with high temperature superconductivity is one of the important current subjects.展开更多
文摘In high temperature oxide superconductors, such as Sr-La-Cu-O,Ba-Y-Cu-O, there is a phase transition from semiconductor to metal as the composition changes under the same condition of heat treatment. Recently the theoretical explanations are proposed, hut the research is still at an initial stage. Thus study in different ways on the cause of the phase transition and its relationship with high temperature superconductivity is one of the important current subjects.
