Lifshitz transition and thermoelectric properties of bilayer graphene

@article{Suszalski2017LifshitzTA,
  title={Lifshitz transition and thermoelectric properties of bilayer graphene},
  author={Dominik Suszalski and G. Rut and A. Rycerz},
  journal={Physical Review B},
  year={2017},
  volume={97},
  pages={125403}
}
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 length $L>10\,\mu{}$m at sub-Kelvin temperatures, that both the Seebeck coefficient and the Lorentz number show anomalies (the additional maximum and minimum, respectively) when the electrochemical potential is close to the Lifshitz energy, which can be attributed to the presence of the van Hove… Expand

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References

SHOWING 1-10 OF 116 REFERENCES
Anomalous thermoelectric transport of Dirac particles in graphene.
TLDR
The results underscore the anomalous thermoelectric transport in graphene, which may be used as a highly sensitive probe for impurity bands near the Dirac point. Expand
Thermoelectric properties of graphene nanoribbons, junctions and superlattices.
TLDR
It is demonstrated that chevron-type GNRs recently synthesized should display superior thermoelectric properties and that increasing the number of interfaces in a single GNR system increases the peak ZT values that are thus maximized in a periodic superlattice. Expand
Minimal conductivity and signatures of quantum criticality in ballistic graphene bilayer
We study the ballistic conductivity of graphene bilayer in the presence of next-nearest neighbor hoppings between the layers. An undoped and unbiased system was found in Rut G. and Rycerz A., Phys.Expand
Evidence for a spontaneous gapped state in ultraclean bilayer graphene
TLDR
A bimodal distribution of minimum conductivities at the charge neutrality point is observed in single and double-gated bilayer graphene devices that have both high mobility and low extrinsic doping. Expand
Thermoelectric transport of massive Dirac fermions in bilayer graphene
Thermoelectric power (TEP) is measured in bilayer graphene for various temperatures and charge-carrier densities. At low temperatures, measured TEP well follows the semiclassical Mott formula with aExpand
Thermal and thermoelectric properties of graphene.
TLDR
It is shown that the superior thermal conductivity of graphene is contributed not only by large ballistic thermal conductance but also by very long phonon mean free path (MFP), which results in important isotope effects and size effects on thermal conduction. Expand
Thermal conductivity of graphene and graphite
The thermal conductivities of graphene and graphite are computed within the framework of Callaway's effective relaxation time theory. Analytical expressions derived by Nihira and Iwata for phononExpand
Thermopower and Nernst effect in graphene in a magnetic field
We report measurements of the thermopower $S$ and Nernst signal $S_{yx}$ in graphene in a magnetic field $H$. Both quantities show strong quantum oscillations vs. the gate voltage $V_g$. OurExpand
Kondo quantum criticality of magnetic adatoms in graphene.
TLDR
It is proposed that the vicinity of the Kondo quantum critical point can be directly accessed with scanning tunneling probes and gating, and it is shown that the exchange coupling in graphene can be controlled across the quantum critical region by gating. Expand
Thermoelectric effects in graphene nanostructures.
TLDR
The main results obtained experimentally and theoretically on the thermoelectric properties of graphene and its nanostructures are reviewed, emphasizing the physical effects that govern these properties. Expand
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4
5
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