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Abstract
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Silicene has introduced itself as an outstanding novel material, which seeks its meritorious place among common
spintronic devices like Cu and Ag. In this work, photogalvanic effect in silicene is studied within the semiclassical approach and beyond Dirac point approximation. Normal electric field plays the role of effective
pseudo-magnetic field which breaks the inversion symmetry and splits the conduction and valence bands. The
interplay between this external field and intrinsic spin-orbit coupling provides spin-valley locking in silicene.
Spin-valley locking in silicene makes this material superior to its carbon counterpart, graphene. Since the absorption of the polarized photons is not equivalent at both of the valleys, spin-valley locking leads to a spinpolarized photocurrent injection.
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