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 magnetoresistance and Hall resistance as a function of the gate voltage is observed as the sample thickness approaches the screening length. Electric field dependent Landau level formation is detected from Shubnikov-de Haas oscillations. The effective mass of electron and hole carriers has been measured from the temperature dependent behavior of these oscillations.
Zhang
Yuanbo
Y
Department of Physics and the Columbia Nanoscale Science and Engineering Center, Columbia University, New York, New York 10027, USA.
Small
Joshua P
JP
Amori
Michael E S
ME
Kim
Philip
P