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(a) Schematic of the square barriers in (b) T-M sequence () potentials along x-direction. Dark regions denote the electrodes applying the T-M sequence potentials on the graphene sheet and denotes the incident angle of carriers passing through the graphene superlattice.
Band structures in terms of energy and incident angle for the T-M gapped GSLs (). The width sizes of A and B are , and the values of voltage loaded on them are and . The other parameter are .
The gap width of T-M gapped GSL () in terms of energy and width ratio of potentials B and A at normal incidence. The yellow area is the energy range of OEG. The energy range for two different width ratios are shown in the figure, for and 1.35.
Calculated transmission by a transfer matrix method. (a) Represents the transmission of GSL1 () with , (b) represents the transmission of GSL2 () with , and (c) is the transmission of heterostrucure GSL1/GSL2. The other parameters are , and in all the case.
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