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HL: Fachverband Halbleiterphysik

HL 28: Transport properties

HL 28.4: Talk

Tuesday, February 26, 2008, 10:15–10:30, ER 164

The minimum conductivity of graphene within quasiclassical approach — •Maxim Trushin and John Schliemann — Institut für Theoretische Physik Universität Regensburg D-93040 Regensburg

We investigate the minimum conductivity of graphene within a quasiclassical approach taking into account electron-hole coherence effects (or Zitterbewegung contributions) which stem from the chiral nature of low energy excitations. Relying on an analytical solution of the kinetic equation we study the carrier scattering on both short and long range scatterers. At the end we found a way how to distinguish between samples with the domination of short and long range scatterers from the minimum conductivity measurements. The model proposed qualitatively explains recent experiments with chemical doping of graphene [1]. Our findings concerning the short range scatterers can be found in Ref.[2].

[1] J. H. Chen, C. Jang, M. S. Fuhrer, E. D. Williams, M. Ishigami arXiv:0708.2408

[2] M. Trushin and J. Schliemann arXiv:0706.1888