We design some graphene superlattice structures with ultra-low thermal conductivity 121 W//mK, which is only 6~ of the straight graphene nanoribbons. The thermal conductivity of graphene superlattice nanoribbons （GS...We design some graphene superlattice structures with ultra-low thermal conductivity 121 W//mK, which is only 6~ of the straight graphene nanoribbons. The thermal conductivity of graphene superlattice nanoribbons （GSNRs） is investigated by using molecular dynamics simulations. It is reported that the thermal conductivity of graphene superlattiee nanoribbons is significantly lower than that of the straight graphene nanoribbons （GNRs）. Compared with the phonon spectra of straight GNRs, GSNRs have more forbidden bands. The overlap of phonon spectra between two supercells is shrinking.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 11004082 and 11291240477the Natural Science Foundation of Guangdong Province under Grant No 2014A030313367the Fundamental Research Funds for the Central Universities under Grant No 11614341
文摘We design some graphene superlattice structures with ultra-low thermal conductivity 121 W//mK, which is only 6~ of the straight graphene nanoribbons. The thermal conductivity of graphene superlattice nanoribbons （GSNRs） is investigated by using molecular dynamics simulations. It is reported that the thermal conductivity of graphene superlattiee nanoribbons is significantly lower than that of the straight graphene nanoribbons （GNRs）. Compared with the phonon spectra of straight GNRs, GSNRs have more forbidden bands. The overlap of phonon spectra between two supercells is shrinking.
