It is found in this letter that the doped C_(60) possesses layer-structure in both bond distortions and electronic states.There are eight layers of carbon atoms in the charged C_(60),and its symmetry is reduced from I...It is found in this letter that the doped C_(60) possesses layer-structure in both bond distortions and electronic states.There are eight layers of carbon atoms in the charged C_(60),and its symmetry is reduced from Ih to D_(5d).This layer-structure indicates that there exist four nonequivalent groups of carbon atoms in the doped C_(60).It contrasts with the pristine C_(60),in which all the sixty carbon atoms are equivalent.One observable consequence of such layer-structure is the split of its NMR spectrum with the ratio 1:1:2:2.展开更多
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 ar...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.展开更多
基金Supported by the Advanced Material Committee and the National Natural Science Foundation of China.
文摘It is found in this letter that the doped C_(60) possesses layer-structure in both bond distortions and electronic states.There are eight layers of carbon atoms in the charged C_(60),and its symmetry is reduced from Ih to D_(5d).This layer-structure indicates that there exist four nonequivalent groups of carbon atoms in the doped C_(60).It contrasts with the pristine C_(60),in which all the sixty carbon atoms are equivalent.One observable consequence of such layer-structure is the split of its NMR spectrum with the ratio 1:1:2:2.
基金supported by the Lab of Infrared Physics of Shanghai Institute of Technical Physics and the National Science Fund.
文摘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.
