Abstract
Measurements of basal plane longitudinal and Hall resistivities were performed on highly oriented pyrolytic graphite samples in a pulsed magnetic field up to applied perpendicular to graphene planes, and temperatures . At and for all studied samples, we observed a sign change in from electron- to holelike. For our best quality sample, the measurements revealed the enhancement in for (), presumably associated with the field-driven charge density wave or Wigner crystallization transition. In addition, well-defined plateaus in were detected in the ultraquantum limit revealing possible signatures of the fractional quantum Hall effect in graphite.
- Received 12 March 2009
DOI:https://doi.org/10.1103/PhysRevLett.103.116802
©2009 American Physical Society