Theory of thermopower in two-dimensional graphene

  title={Theory of thermopower in two-dimensional graphene},
  author={E. H. Hwang and Enrico Rossi and Sankar Das Sarma},
  journal={Physical Review B},
Motivated by recent experiments by Yuri M. Zuev et al. [Phys. Rev. Lett. 102, 096807 (2009)], Peng Wei et al. [Phys. Rev. Lett. 102, 166808 (2009)], and Joseph G. Checkelsky et al. [Phys. Rev. B 80, 081413(R) (2009)], we calculate the thermopower of graphene incorporating the energy dependence of various transport scattering times. We find that scattering by screened charged impurities gives a reasonable explanation for the measured thermopower. The calculated thermopower behaves as $1/\sqrt{n… 

Figures from this paper

Enhancement of thermoelectric performance of a nanoribbon made of α-Τ3 lattice.
The presence of line defect, close to the edge, can cause a significant impact on the edge modes as well as on electrical conductance and thermopower and the figure of merits can be enhanced by thirty times under suitable parameter regime in comparison to the case of graphene.
Lifshitz transition and thermoelectric properties of bilayer graphene
This is a numerical study of thermoelectric properties of ballistic bilayer graphene in the presence of trigonal warping term in the effective Hamiltonian. We find, in the mesoscopic samples of the
Electric, thermoelectric, and thermal conductivities of graphene with short-range unitary and charged impurities
Motivated by the experimental measurement of electrical and hall conductivity, thermopower and Nernst effect, we calculate the longitudinal and transverse electrical and heat transport in graphene in
Effects of the edge states on conductance and thermopower for the bilayer graphene nanoribbons
By using the nonequilibrium Green’s function combined with the tight-binding Hamiltonian, we have studied the effects of the edge states on the conductance and the thermopower for zigzag bilayer
Behavior of thermopower of graphene in Bloch–Grüneisen regime
Thermopower (TP), S of pure graphene in the Bloch–Grüneisen (BG) regime is investigated assuming electrons to be scattered by in‐plane acoustic phonons and taking into account the temperature
Thermoelectric transport in two-dimensional topological insulator state based on HgTe quantum well
The thermoelectric response of HgTe quantum wells in the state of two-dimensional topological insulator (2D TI) has been studied experimentally. Ambipolar thermopower, typical for an electron-hole
Thermoelectric and thermal transport properties in ABA-stacked trilayer graphene
Abstract.We numerically study the thermoelectric and thermal transport in ABA-stacked trilayer graphene in the presence of a strong magnetic field and disorder. We find that the thermoelectric
Magnetothermoelectric transport properties in graphene superlattices with one-dimensional periodic potentials
We numerically study the thermoelectric transport in graphene superlattice in the presence of a strong magnetic field and disorder, with a one-dimensional periodic potential barrier oriented along
Magnetothermoelectric transport in modulated and unmodulated graphene.
  • R. Nasir, K. Sabeeh
  • Physics
    Journal of physics. Condensed matter : an Institute of Physics journal
  • 2011
The thermal transport coefficients for a graphene monolayer subjected to a periodic electric modulation in a magnetic field are evaluated and the results are presented as a function of the magnetic field and the gate voltage.
Layer stacking dependence on thermoelectric properties of massive Dirac fermions in bilayer graphene
  • R. Ma
  • Physics, Materials Science
  • 2013
We numerically study the thermoelectric transport in AB- and AA-stacked bilayer graphene in the presence of a strong magnetic field and disorder. In the AB-stacked case, we find that the