Soliton excitation in superlattice

Excitation of soliton in superlattice has been investigated theoretically. It is noted that the soliton velocity u and the length L depend on the amplitude E0 and that an increase in the amplitude causes soliton width L to approach zero and the velocity u to that of light V in homogeneous medium. The characteristic parameters of soliton u, L and E0 are related by expression u/L E0 = ed/2(h/2π) which is constant depending only on the SL period d. It is observed also that the soliton has both energy E = 8V2 (1 - u2/V2)-1/2 and momentum P = u/V2 E which makes it behave as relativistic free particle with rest energy 8V2. Its interaction with electrons can cause the soliton electric effect in SL. (author). 27 refs