Electric Field Modulation of Galvanomagnetic Properties of Mesoscopic   Graphite
  Electric field effect devices based on mesoscopic graphite are fabricated for galvanomagnetic measurements. Strong modulation of magneto-resistance and Hall resistance as a function of gate voltage is observed as sample thickness approaches the screening length. Electric field dependent Landau level formation is detected from Shubnikov de Haas oscillations in magneto-resistance. The effective mass of electron and hole carriers has been measured from the temperature dependant behavior of these oscillations. 
Yuanbo Zhang, Joshua P. Small, Michael E. S. Amori, and Philip Kim