Such an adjusting function of interface adjusting intermediate-layer 5A can also be simultaneously given to another interface adjusting intermediate-layer 5B. That is, metal, such as copper (Cu), gold (Au), silver (Ag), platinum (Pt), palladium (Pd), iridium (Ir), and osmium (Os), is advantageous metal in order to give two-dimensional ???fluctuation??? of the degree of conduction to the oxide inte