  Superconductivity in a doped topological insulator (TI) is a very interesting
phenomenon and constitute a new finding of the modern day condensed matter
physics. Here we have investigated the physical and transport properties of
such an intercalated TI, namely, Bi$_2$Se$_3$ via a strong coupling route. The
unique bandstructure of Bismuth Selenide with a dirac cone is strongly
influenced with the intercalation by Silver (Ag) (Gold (Au) is included to
compare and contrast) at high densities, along with novel structural effects,
leading to the emergence of orbital selective metal insulator transition with
possible superconductivity at low temperature. Here we have explored the part
of multi orbital electron electron correlations in Ag and Au intercalated
Bi$_2$Se$_3$ via dynamical-mean-field theory with local density approximation,
and the impact of this intercalation in establishing new physical properties
and possible energy applications.
