SOLITONIC MECHANISM OF STRUCTURAL TRANSFORMATIONS IN A NONDEGENERATE CHAIN OF PARTICLES WITH ANHARMONIC AND COMPETING INTERACTIONS

A new type of dynamics of an infinite atomic chain of particles with a nharmonic and competing interactions is investigated in the general ca se when its homogeneous equilibrium states have different energies, Co operative transformations realized by topological and nontopological s olitons are revealed. The soliton velocity spectrum is calculated in t he framework of an approximate continuous second-order theory. Soliton s with vanishing velocity are shown to be in good asymptotical corresp ondence with the exact static solutions of the Reichert-Schilling mode l.