  In the usual perception, surface superconductivity is associated with the
surface nucleation of a superconducting condensate above the upper critical
field in type-II superconductors or with a rearrangement of phonon properties
and the electron-phonon coupling near surfaces/interfaces. Recently, it has
been found that there is another example when the surface superconducting
temperature is increased up to 20-25% as compared to the bulk one due to
constructive interference of superconducting pair states. In the present work,
we demonstrate that in fact, such an interferenceinduced enhancement can be
much more pronounced, up to nearly 70%. Furthermore, here it is shown that such
an interference enhancement persists over a wide range of microscopic
parameters.
