García Bach, Ma. de los ÁngelesPeñaranda Ayllon, AngelinaKlein, D. J.2009-10-282009-10-2819920163-1829https://hdl.handle.net/2445/9845Distortions of polyacene polymers are studied within a many-body valence-bond framework using a powerful transfer-matrix technique for the valence-bond (or Heisenberg) model of the system. The computations suggest that the ground-state geometry is either totally symmetric or possibly exhibits a slight (A2 or B2 symmetry) bond-alternation distortion. The lowest-energy (nonsymmetric, in-plane) distortions are the A2 and B2 modes, which, within our approximations, are degenerate.11 p.application/pdfeng(c) The American Physical Society, 1992Química físicaPolímersElastòmersPhysical chemistryPolymersElastomersinfo:eu-repo/semantics/article63462info:eu-repo/semantics/openAccess