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Paper   IPM / Nano-Sciences / 16352
School of Nano Science
  Title:   Thermoelectric response of nodal-line semimetals: Probing the Fermi surface topology
  Author(s): 
1.  Shahin Barati
2.  Saeed Abedinpour
  Status:   Published
  Journal: Phys. Rev. B
  Vol.:  102
  Year:  2020
  Supported by:  IPM
  Abstract:
We investigate the low-temperature thermoelectric properties of three-dimensional nodal-line semimetals within the semiclassical Boltzmann formalism. Considering short-range interaction between electrons and scattering agents, we calculate the anisotropic relaxation times and then obtain the charge conductivity and thermopower along the radial and the axial directions with respect to the nodal-line plane. Increasing the carrier concentration, a sharp change in the thermopower signals topological transition in the shape of the Fermi surface from a torus into an ellipsoid. An adequate treatment of the energy and direction dependence of the relaxation time is necessary for the observation of the topological transition of the Fermi surface in the thermoelectric properties.

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