“…The other is a speculation on the mechanism of Cu-oxide high T, superconductivity on the basis of recent studies of transport properties in (Bi, ~,Pb,),Sr,Ca,Cu,O,,+, ) and of the shift of temperature position of the sound velocity jump in YBa,CuJO, and (La, -xSrx)zCuO, under high magnetic fields (Hone and , ), as well as the studies of the effect of magnetic fields on the specific heat jump position made by Fisher et al (1988), Inderhees et al (1988) and Salamon et al (1988). The present proposal of the mechanism is closely linked to attempts to understand the reason for the linear temperature dependence of the inverse Hall coefficient in these Cu-oxide superconductors obtained by Iye et al (1988), Penney et al (1988) and Stormer et al (1988). Such understanding may be the key to solving the mechanism of Cu-oxide high T, superconductivity.…”