Charge Transport and Inhomogeneity near the Charge Neutrality Point in Graphene

Details Charge Transport and Inhomogeneity near the Charge Neutrality Point in Graphene Charge Transport and Inhomogeneity near the Charge Neutrality Point in Graphene

2007-05-22

arxiv.org/abs/0705.3239v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.77.081402

The magnetic field-dependent longitudinal and Hall components of the resistivity rho_xx(H) and rho_xy(H) are measured in graphene on silicon dioxide substrates at temperatures from 1.6 K to room temperature. At charge densities near the charge-neutrality point rho_xx(H) is strongly enhanced and rho_xy(H) is suppressed, indicating nearly equal electron and hole contributions to the transport current. The data are inconsistent with uniformly distributed electron and hole concentrations (two-fluid model) but in excellent agreement with the recent theoretical prediction for inhomogeneously distributed electron and hole regions of equal mobility. At low temperatures and high magnetic fields rho_xx(H) saturates to a value ~h/e^2, with Hall conductivity << e^2/h, which may indicate a regime of localized v = 2 and v = -2 quantum Hall puddles.

Affiliated with

Also associated with

No associations

Rating

Charge Transport and Inhomogeneity near the Charge Neutrality Point in Graphene does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Charge Transport and Inhomogeneity near the Charge Neutrality Point in Graphene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Charge Transport and Inhomogeneity near the Charge Neutrality Point in Graphene will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-416453