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Combining multiple emergent correlated properties such as superconductivityand magnetism within the topological matrix can have exceptional consequencesin garnering new and exotic physics. Here, we study the topological surfacestates from a noncentrosymmetric $\alpha$-BiPd superconductor by employingangle-resolved photoemission spectroscopy (ARPES) and first principlecalculations. We observe that the Dirac surface states of this system haveseveral interesting and unusual properties, compared to other topologicalsurface states. The surface state is strongly anisotropic and the in-planeFermi velocity varies rigorously on rotating the crystal about the $y$-axis.Moreover, it acquires an unusual band gap as a function of $k_y$, possibly dueto hybridization with bulk bands, detected upon varying the excitation energy.Coexistence of all the functional properties, in addition to the unusualsurface state characteristics make this an interesting material.

Unusual Dirac fermions on the surface of noncentrosymmetric $\alpha$ - BiPd superconductor