Abstract:
Amplification of Acoustic Waves in Armchair Graphene Nanoribbon (AGNR) in the presence of an external Electric and Magnetic field was studied using the Boltzmann’s kinetic equation. The general expression for the Amplification (Γ⊥/Γ0) was obtained in the region ql >> 1 for the energy dispersion ε(~) near the Fermi point. For various parameters of the quantized wave vector (β), the analysis of Γ⊥/Γ0 against the sub-bands index (pi); width of AGNR; and magnetic strength (Ωτ ), were numerically analyzed. The results showed a linear relation for Γ⊥/Γ0 with constant electric field (E~ ) but nonlinear for Γ⊥/Γ0 with q or Ωτ . Sound Amplification in AGNR is reported with an increase in Acoustic wave number (~) > 1.5 × 107 cm−1. This can cause SASER in Armchair Graphene Nanoribbon (AGNR).
