Faraday rotation effect in periodic graphene structure
  We report the magneto-optical rotation effect in a periodic graphene-sheet structure. Due to the masslessness of carriers in graphene, the magnetic response is very sensitive and the magneto-optical rotation effect is therefore significant. We predict that the Verdet constant of the periodic graphene-sheet structure is roughly 10-100 times that of rare-earth-doped magneto-optical glass in the infrared region. 
Daqing Liu, Shengli Zhang, Ning Ma and Xinghua Li
cond-mat.mes-hall