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ΪʲôÀíÂÛÔ¤²âgraphene spin diffusion length ¿É´ïµ½100 um,µ«Êµ¼Ê²âÁ¿»¹²»µ½10um, ÊÒÎÂÖ»ÓÐ1-2 um ÔÚsingle layer graphene. ÁíÍ⣺Spin life time is 50-200ps, the order of magnitude shorter than expected from the intrinsic spin-orbit coupling(-us).The results indicates that the presence of the extrinsic spin relaxation mechanism. Çëǰ±²Ö¸µã¡£ why graphene for spintronics? 1. Extraordinary high mobility >200000cm2v-1s-1 (suspended , low temperature) >40000cm2v-1s-1 (on sio2 , room temperature) -------Future high-speed transistor materials 2.only light atoms (carbon)-----small spin-orbit interaction long spin relaxation time high mobility ----long spin coherent length ----------------Future spintronics devices |
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liuyanping105
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