A Model for Soliton Excitations in (CH)x

We present a simple model for those properties of (CH)_x which are associated with the concept of solitions. We propose an “an initio” calculation of the wave function and energy of the soliton within an “Unrestricted Hartree-Fock” scheme. Electron-electron interactions are capable to originate an organization into domains and walls when described in terms of the so-called alterant orbitals of LÖWDIN. The essential features of the treatemnt are reviewed and numerical results are re ported. Then a connection is made between the model and some other formalisms. Finally we discuss a tent ative interpretation of electron spin resonance experiments. Specially emphasized are numerical simulations of spectra and analy sis of diffusive motions of solitons.