Lattice effects on the dHvA oscillations and magnetic breakdown in quasi-two dimensional organic conductors

We describe a theoretical approach to investigate the effect of the lattice potential on the dHvA oscillations and magnetic breakdown in quasi-two dimensional organic metals such as α-(BEDT-TTF)2KHg(SCN)4. We construct a tight binding Hamiltonian based on the extended Huckel approximation to describe these systems which can then be numerically solved to obtain the energy spectrum as a function of magnetic field. Results on the field dependence of the chemical potential and thermodynamic potential are presented.