New localized electronic states of soliton in trans-(CH)X

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It is well known that the soliton in trans-(CH)X possesses a localized electronic state at the center of the gap. Besides this mid-gap state, we have found that, there exist another four localized electronic states around the soliton. They form four discrete levels outside the conduction and valence bands: one sits near the bottom edge of the conduction band and one near the top edge of the conduction band; another two are located symmetrically near the valence band.