Influence of Interchain Electron Hopping on Commensurate One-Dimensional Conductors

It is shown that electron tunneling between chains in the crystalline form of quasi-1-D conductor like polyacetylene, (CH)_x, may result in the instability of the Peierls structure at high enough values of the hopping integrals. The instability leads to the formation of a superstructure which can be described as a periodic array of soliton walls perpendicular to the chain axis.