Spin transport in graphene superlattice under strain

• We investigate spin polarization properties through a strained graphene superlattice.
• The spin polarization depends on the direction and sign of the strain.
• Spin polarization increase by increasing the strain strength.
• The angular range of the spin-inversion depends on the strain strength.

In this paper, the spin-dependent transport and the spin polarization properties for graphene superlattice with Rashba spin–orbit interaction (RSOI) in the presence of zigzag and armchair direction strain are studied. It is found that for the zigzag direction strain the angular range of the spin-inversion can be efficiently controlled by the strain strength. In addition, the efficiency of spin-inversion and spin-dependent conductivity decreases by increasing the strain strength. When the armchair direction strain is applied to a monolayer graphene superlattice the spin polarization can be observed and increases by increasing the strain strength, whereas for the zigzag direction strain it is zero.

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