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Paper   IPM / Physic / 14259
School of Physics
  Title:   Relaxation times and charge conductivity of silicene
1.  A. Mazloom
2.  F. Parhizgar
3.  S. H.Abedinpour
4.  R. Asgari
  Status:   Published
  Journal: Phys. Rev. B
  Vol.:  94
  Year:  2016
  Pages:   035153
  Supported by:            http://dx.doi.org/10.1103/PhysRevB.94.035153 IPM
We investigate the transport and single particle relaxation times of silicene in the presence of neutral and charged impurities. The static charge conductivity is studied using the semiclassical Boltzmann formalism when the spin-orbit interaction is taken into account. The screening is modeled within Thomas-Fermi and random phase approximations. We show that the the transport relaxation time is always longer than the single particle one. Easy electrical controllability of both carrier density and band gap in this buckled two-dimensional structure makes it a suitable candidate for several electronic and optoelectronic applications. In particular, we observe that the DC charge conductivity could be easily controlled through an external electric field, a very promising feature for applications as electrical switches and transistors. Our findings would be qualitatively valid for other buckled honeycomb lattices of the same family, such as germanine and stanine.

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