  We present the effect of different stacking orders on carrier transport
properties of multi-layer black phosphorous. We consider three different
stacking orders AAA, ABA and ACA, with increasing number of layers (from 2 to 6
layers). We employ a hierarchical approach in density functional theory (DFT),
with structural simulations performed with Generalized Gradient Approximation
(GGA) and the bandstructure, carrier effective masses and optical properties
evaluated with the Meta-Generalized Gradient Approximation (MGGA). The carrier
transmission in the various black phosphorous sheets was carried out with the
non-equilibrium Greens function (NEGF) approach. The results show that ACA
stacking has the highest electron and hole transmission probabilities. The
results show tunability for a wide range of band-gap, carrier effective masses
and transmission with a great promise for lattice engineering (stacking order
and layers) in black phosphorous.
