  Weyl semimetal TaAs, a congenial host to the massless Weyl fermions,
spontaneously lacks the time-reversal and the inversion symmetry and thus
effectuates topologically stable Weyl nodes, resembling magnetic monopoles in
momentum space. Former experimental analysis had revealed that the near-zero
spin-polarization of bulk TaAs experiences a boost in presence of
point-contacts of non-magnetic metals along with the associated phenomena of
tip-induced superconductivity, providing the impetus to study the large-area
stacked interfaces of TaAs with Noble metals like Au and Ag. First-principles
calculations on these interfacial systems have manifested an increment of the
interface-induced spin-polarization and contact-induced transport
spin-polarization. In contrast to the single interface, for stacked system, the
broken inversion symmetry of the system introduces a z-directional
band-dispersion resulting in an energetically separated series of Weyl cones.
The Weyl cones for TaAs/Ag and TaAs/Au stacked interfaces are observed to be of
type-I and type-II nature respectively. Thus, the current study demonstrates
the designing of two different types of spin-polarized Weyl systems from
non-magnetic metal and type I Weyl components.
