REPLICA-TRICK APPROACH TO PERCOLATION NETWORKS WITH CENTRAL AND BOND-BENDING FORCES

For the first time, a self-consistent effective medium is set up for c entral-force percolation networks with bond-bending forces, which do n ot allow the standard technique, the HCPA, to be used. By means of the replica trick. for two-dimensional bond-dilute triangular lattices wi th central and bond-bending forces, an effective lattice potential wit h complex, frequency dependent force constants is derived. The density of vibrational states is calculated and compared with corresponding r esults obtained by means of other methods.