  We study strong f-electron localization effect on surface state of a generic
topological Kondo insulator (TKI) system by performing a mean-field theoretic
(MFT) calculation within the frame-work of periodic Anderson model (PAM) using
slave-boson technique. The surface metallicity together with bulk insulation is
found to require this type of localization. A key distinction between surface
states in a conventional insulator and a topological insulator is that, along a
course joining two time-reversal invariant momenta (TRIM) in the same BZ, there
will be intersection of these surface states, even/odd number of times, with
the Fermi energy inside the spectral gap. For even (odd) number of surface
state crossings, the surface states are topologically trivial (non-trivial).
The symmetry consideration and the pictorial representation of surface band
structure obtained here show odd number of crossing leading to the conclusion
that, at least within PAM framework, the generic system is a strong topological
insulator.

Strongly Correlated Electrons;Mesoscale and Nanoscale Physics