FERMI RESONANCE SOLITARY WAVE ON THE INTERFACE BETWEEN 2 LAYERS OF ORGANIC SEMICONDUCTORS

The nonlinear dynamics on the interface between two layers of organic semiconductors is discussed for the case of Fermi resonance, which occ urs when the excitation energy h omega(c) on one side of the interface approximately equals 2h omega(b), where h omega(b) is the excitation energy on the other side. In the long wave limit the nonlinear periodi c waves can propagate in the form of solitons. A variational approach to the description of such solitary excitations is suggested, which ca n be applied in a broad range of system parameters.