Figure 1

(a) Free-standing densely packed graphene strips biased with a bridge using the bias voltage v₁. Normalized \(\,\Im \left( {\sigma_{xx} } \right).\Im \left( {\sigma_{yy} } \right)\) for W = 220 nm (b) considering different chemical potentials μ_c1 (eV) for G = 20 nm and (c) considering different gap distances G (nm) for μ_c1 = 1 eV. The scattering rate is 20 meV in all simulations. The closed-form formulas for finding the required bias voltage for each chemical potential can be found in⁴⁸. The symbol \(\Im\) represents the imaginary part of the complex function and the normalization factor is the maximum value of \(\Im \left( {\sigma_{xx} } \right).\Im \left( {\sigma_{yy} } \right)\).