Volume 87, Number 5, September 2009
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||16 September 2009|
Time evolution of charge conductivity of graphene bilayers
National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University Nanjing 210093, China
Accepted: 18 August 2009
We adopt the dynamical method developed to solve the charge transport properties in monolayer graphene system (Lewkowicz M. and Rosenstein B., Phys. Rev. Lett., 102 (2009) 106802) to bilayer graphene. We calculate the energy and the current density evolving with time when an electron field is applied to the system at time . The conductivity shows a rapid oscillation at the beginning (small t), but soon converges to a steady value which coincides with the optical conductivity study value. We suggest that the physical origin of the minimum conductivity can be rooted to the electron-hole pairs excited by the electron field and the coherent transport.
PACS: 73.21.Ac – Multilayers / 73.23.Ad – Ballistic transport / 81.05.Uw – Carbon, diamond, graphite
© EPLA, 2009
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.