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The recent work on stanene as quantum spin Hall insulators made usinvestigate bilayer stanene using first principle calculations. With an aim ofimproving and developing new properties, via modulating the stacking order (andangle) of the bilayers. This stacking of layers has been proven technique formodulating the properties of monolayer materials. Here we design multiplebilayer systems, with different stacking angles and AA and AB configurations.Rather observing an improvement in bandgap due to spin-orbit coupling (SOC), wewitness a splitting of the band due to SOC, a characteristic behavior ofstacked MoS2 sheets. This splitting of the bands gives rise to different,independent and distinct spin-up and spin-down channels, manifesting a valleydependent spin polarization. Also, as a contrast to stacked MoS2 system wenotice in our system the stacking angle and order, does effect electronicstates.

Band splitting in bilayer stanene electronic structure scrutinized via first principle DFT calculations