@misc{jens2015a,
  title = {Persistent hysteresis in graphene-mica van der Waals heterostructures},
  author = {Jens Mohrmann, Kenji Watanabe, Takashi Taniguchi, Romain Danneau},
  publisher = {IOP Publishing},
  year = {2015-01-09},
  keywords = {Graphene, mica substrate, hysteresis}
}