Oscillating magnetoresistance in graphene p-n junctions at intermediate   magnetic fields
  We report on the observation of magnetoresistance oscillations in graphene p-n junctions. The oscillations have been observed for six samples, consisting of single-layer and bilayer graphene, and persist up to temperatures of 30 K, where standard Shubnikov-de Haas oscillations are no longer discernible. The oscillatory magnetoresistance can be reproduced by tight-binding simulations. We attribute this phenomenon to the modulated densities of states in the n- and p- regions. 
Hiske Overweg, Hannah Eggimann, Ming-Hao Liu, Anastasia Varlet, Marius   Eich, Pauline Simonet, Yongjin Lee, Kenji Watanabe,...
cond-mat.mes-hall