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Soliton Excitations In Polyacetylene
Published 1980 · Materials Science
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A theoretical &n ~lysis of the excit ~tion spectrum of long-chain polyenes is presented. Because of the twofold degeneracy of the ground state of the dimerized ch ~in, element ary excit~tions corresponding to topological solitons «re obt ~ined. The solitons c'~n h'~ve three ch;urge st &tes g =0. + &. The neutral soliton h'~s spin one-h;~lf while the ch;urged solitons h;ive spin zero. One electronic state is loc'&lized;~t the g ip center for e;~ch soliton or &ntisoliton present. The soliton's energy of form ~tion, length, mass, activation energy for motion, ~nd electronic properties «re c calculated. These results «re compared with experiment.