Abstract
Abstract Solitons with fractional charge ± e/2 might be experimentally realized in the highly correlated 1:2 salts of TCNQ if the quarter filled TCNQ chains of these compounds correspond to linear Hubbard chanins dominated by the on-site Coulomb repulsion. The low-teperature current carrying excitations of the TCNQ chains would consist of thermally activated pairs of such fractionally charged solitons. The addition of a single electron to a TCNQ chain would lead to the formation of two identical solitons with half-integer charge.
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