The Stratified Superconductivity in Ba_0.6K_0.4BiO₃ Single Crystal: Direct Measurement of Energy Gap between Homo-, and Inhomogeneous States

Figure 2

Dependence of static resistance from current, introduced in a sample, shows that when the system transfers into resistive () state, while its magnetic susceptibility remains virtually permanent relative to the homogenous superconductivity state. On return course when current decreases the nonzero resistance is retained until current value , which answers hysteresis character of the volt-ampere characteristic, on the basis of which the dependence was obtained.