Minimum Electrical and Thermal Conductivity of Graphene: A Quasiclassical Approach

Details Minimum Electrical and Thermal Conductivity of Graphene: A Quasiclassical Approach Minimum Electrical and Thermal Conductivity of Graphene: A Quasiclassical Approach

2007-06-13

arxiv.org/abs/0706.1888v3

Phys. Rev. Lett. v.99, 216602 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages 1 figure (final version, as published in PRL)

Scientific paper

10.1103/PhysRevLett.99.216602

We investigate the minimum conductivity of graphene within a quasiclassical approach taking into account electron-hole coherence effects which stem from the chiral nature of low energy excitations. Relying on an analytical solution of the kinetic equation in the electron-hole coherent and incoherent cases we study both the electrical and thermal conductivity whose relation fullfills Wiedemann-Franz law. We found that the most of the previous findings based on the Boltzmann equation are restricted to only high mobility samples where electron-hole coherence effects are not sufficient.

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