  Superconductors with non-trivial band topology are emerging as one of the
best avenues to study quantum anomalies and experimental realization of
Majorana Fermions. This article reports the successful crystal growth of
superconducting SnAs, which can have topologically non-trivial states, as
evidenced in DFT (Density Functional Theory) calculations, Z2 invariants, and
topologically surface state. Here, we followed a two-step method to grow SnAs
crystal. The powder XRD (X-ray Diffractometry) pattern of synthesized crystal
ensures that the crystal is grown in a single phase with a NaCl type cubic
structure and the EDAX (Energy Dispersive X-ray Analysis) endorses the
stoichiometry of the as-grown sample. The DFT calculations performed with and
without the inclusion of spin-orbit coupling (SOC) show band inversion at
various K symmetry points near the Fermi level. The recorded Raman spectra show
two different modes, which are assigned as A1 and ETO vibrations. The ZFC
(Zero-Field Cooled) & FC (Field Cooled), as well as the isothermal M-H
(Magnetization vs. field) measurements, are also performed for the topological
non-trivial SnAs superconductor, which eventually confirms the weak type-II
superconductivity at 4K. Various other superconductivity parameters viz. kappa
parameter, coherence length, and penetration depth are also calculated to probe
the as-grown sample's characteristics.
