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Paper   IPM / P / 14457
School of Physics
  Title:   Thermoelectric transport in monolayer phosphorene
1.  M. Zare
2.  B. Zare Rameshti
3.  F. G. Ghamsari
4.  R. Asgari
  Status:   Published
  Journal: Phys. Rev. B
  Vol.:  95
  Year:  2017
  Pages:   045422
  Supported by:  IPM
We apply the generalized Boltzmann theory to describe thermoelectric transport properties of monolayer phosphorene in the presence of short- and long-range charged impurity interactions. First, we propose a low-energy Hamiltonian to explore the accurate electronic band structure of phosphorene in comparison with those results obtained by density-functional simulations. We explain the effect of the coupling between the conduction and valence bands on the thermoelectric properties. We show that the electric and heat conductivity of phosphorene are highly anisotropic, while the Seebeck coefficient and figure of merit, without being influenced via either the presence or absence of the coupling term, are nearly isotropic. Furthermore, we demonstrate that the conductivity for n-type of doping is more influenced by the coupling term than that of the p-type. Along with thermopower sign change, profound thermoelectric effects can be achieved.

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