A numerical solution for the huge matrix derived for each problem is studied. Numericaldifference schemes adaptable to the current problems are also developed. As well known, superconductivity is a phenomenon that the electrical resistance of the materials disappears completely at low temperatures. Recently, much attention is paid on the nature of the high temperature superconductors and the multilayer superconductors, because these systems show peculiar features, as compared with the conventional bulk superconductors, and have great importance from both scientific and technological viewpoints. In our laboratory, the both type of superconductors are studied experimentally.
Materials show various characteristics.
For example, some show very high magnetism and the others do not, or some are electrical and thermal conductors and the others are insulators. The answer is based on the fact that most of physical characteristics of materials are determined by the states of electrons in each material. Electrons have spin, a kind of the smallest unit of magnets. On the other hand, the material may change its characteristics drastically depending on its temperature. Associate Professor, D. Sc.