title: Charge transport in the insulating state of (DMe-DCNQI)2Li above T(SP): a possible fractional charge soliton conduction with +/-1 / 2e.
abstract: A spin-Peierls system (DMe-DCNQI)2Li is studied with W-band electron paramagnetic resonance (EPR) ( approximately 94 GHz) to unveil a charge transport mechanism in the insulating 4k(F) charge density wave state above T(SP). The electron hopping between the neighbor DCNQI columns provides an additional broadening of the EPR linewidth, since the neighbor columns are generally nonequivalent to each other with respect to g shift. The obtained intercolumn hopping rates lead us to the conclusion that the electron hopping to a hole soliton carrying a fractional charge of e / 2 in the neighbor column dominates the intercolumn charge transport.
authors.affiliation: Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan.
authors.forename: Maki
authors.initials: M
authors.lastname: Hiraoka
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Sakamoto
authors.forename: Kenji
authors.initials: K
authors.lastname: Mizoguchi
authors.forename: Tatsuhisa
authors.initials: T
authors.lastname: Kato
authors.forename: Reizo
authors.initials: R
authors.lastname: Kato