Biaxial strain and magnetic field effects on electronic and optical properties of fl-graphyne structure

We compute electronic density of states, thermodynamic and optical conductivities of fl-graphyne layer under applying biaxial strains. Particularly, the imaginary part of dielectric constant, which is proportional to the electromagnetic wave absorption rate, of fl-graphyne due to the magnetic field and biaxial strain effects has been calculated. The temperature dependence of Pauli spin susceptibility and specific heat of the structure under applying magnetic field has been found. Tight binding model Hamiltonian has been applied for describing electron dynamics infl-graphyne layer in the presence of magnetic field. The effects of biaxial inplane strain on the frequency behavior of the imaginary part of optical dielectric constant of fl-graphyne layer. Linear response theory and Green's function approach have been exploited to obtain the frequency behavior of optical behavior of the structure. Moreover, the frequency dependences of transmissivity and reflectivity of electromagnetic wave between two media separated by afl-graphyne layer are given. Our numerical results indicate that the frequency dependence of optical absorption shows a monotonic decreasing behavior for each compressive and tensile strain parameter. Also, the frequency dependence of transmissivity and reflectivity of electromagnetic wave between two media separated by fl-graphyne layer for normal incidence has been investigated due to the effects of magnetic fields and strain parameters. The spin susceptibility of fl-graphyne layer increases with magnetic field at fixed temperature however decreasing behavior for susceptibility is found for each value of magnetic field.