Transport properties and electron filter in 8-Pmmn borophene superlattice

The energy band structures and transport properties in 8-Pmmn borophene superlattice were investigated. It is found that the Dirac point at other energy appears in the energy band structure and the Dirac cone is tilted. As a function of the incident angle, the transmission probability no longer maintains chiral symmetry. The transmission gaps highly dependent on the widths of the well and barrier of the superlattice. Some forbidden bands appear in the transmission probability with different incident angles, the location and width of the forbidden bands can be regulated by changing the system parameters, which filters the electrons. Modulating the widths of the well and barrier the original Dirac point in superlattice disappears, the minimum value of the conductance at the initial Dirac point was changed into maximum when the widths of the well and barrier of the superlattice were increased to a certain value.