  The temperature and magnetic field dependent activation energy, U(T, H), is
one of the most important parameter in the field of applied superconductivity
as it primarily determines both the crtical current density and the
irreversibility field. Previously, we have determined the doping dependent U(T,
H) from the analysis of field dependent resistive transitions in high-quality
c-axis oriented crytalline thin films of Y123 (arXiv:1207.4312). In this short
communication, we have showed a direct link between the characteristic field Ho
that sets the magnitude of U(T, H) and the pseudogap temperature, T*. The
strong dependence of Ho on the in-plane hole content, p, seems to follow from
the p-dependent evolution of the pseudogap energy scale (T*, when expressed in
temperature) which reduces the superconducting condensation energy as hole
concentration decreases.
