We investigate the quasiparticle and transport properties of a model describing interacting Dirac and Weyl semimetals in the presence of local Hubbard repulsion U, where we explicitly include a deviation from the linearity of the energy-momentum dispersion through an intermediate-energy scale Λ. Our focus lies on the correlated phase of the semimetal. At the nodal point, the renormalization of spectral weight at a fixed temperature T exhibits a weak dependence on Λ but is sensitive to the proximity to the Mott transition. Conversely, the scattering rate of quasiparticles and the resistivity display high-temperature exponents that crucially rely on Λ, leading to a crossover towards a conventional Fermi-liquid behavior at finite T. Finally, by employing the Nernst-Einstein relation for conductivity, we identify a corresponding density crossover as a function of the chemical potential.
%0 Journal Article
%1 PhysRevB.109.045118
%A Poli, Arianna
%A Wagner, Niklas
%A Fischer, Max
%A Toschi, Alessandro
%A Sangiovanni, Giorgio
%A Ciuchi, Sergio
%D 2024
%I American Physical Society
%J Phys. Rev. B
%K a
%N 4
%P 045118
%R 10.1103/PhysRevB.109.045118
%T Interacting nodal semimetals with nonlinear bands
%U https://link.aps.org/doi/10.1103/PhysRevB.109.045118
%V 109
%X We investigate the quasiparticle and transport properties of a model describing interacting Dirac and Weyl semimetals in the presence of local Hubbard repulsion U, where we explicitly include a deviation from the linearity of the energy-momentum dispersion through an intermediate-energy scale Λ. Our focus lies on the correlated phase of the semimetal. At the nodal point, the renormalization of spectral weight at a fixed temperature T exhibits a weak dependence on Λ but is sensitive to the proximity to the Mott transition. Conversely, the scattering rate of quasiparticles and the resistivity display high-temperature exponents that crucially rely on Λ, leading to a crossover towards a conventional Fermi-liquid behavior at finite T. Finally, by employing the Nernst-Einstein relation for conductivity, we identify a corresponding density crossover as a function of the chemical potential.
@article{PhysRevB.109.045118,
abstract = {We investigate the quasiparticle and transport properties of a model describing interacting Dirac and Weyl semimetals in the presence of local Hubbard repulsion U, where we explicitly include a deviation from the linearity of the energy-momentum dispersion through an intermediate-energy scale Λ. Our focus lies on the correlated phase of the semimetal. At the nodal point, the renormalization of spectral weight at a fixed temperature T exhibits a weak dependence on Λ but is sensitive to the proximity to the Mott transition. Conversely, the scattering rate of quasiparticles and the resistivity display high-temperature exponents that crucially rely on Λ, leading to a crossover towards a conventional Fermi-liquid behavior at finite T. Finally, by employing the Nernst-Einstein relation for conductivity, we identify a corresponding density crossover as a function of the chemical potential.},
added-at = {2024-03-26T10:20:05.000+0100},
author = {Poli, Arianna and Wagner, Niklas and Fischer, Max and Toschi, Alessandro and Sangiovanni, Giorgio and Ciuchi, Sergio},
biburl = {https://www.bibsonomy.org/bibtex/245b73df05154633b33ccbb7f192386f7/ctqmat},
day = 10,
doi = {10.1103/PhysRevB.109.045118},
interhash = {1554238b7a2ac88ae285d75b320a13f8},
intrahash = {45b73df05154633b33ccbb7f192386f7},
journal = {Phys. Rev. B},
keywords = {a},
month = {01},
number = 4,
numpages = {16},
pages = 045118,
publisher = {American Physical Society},
timestamp = {2024-03-26T10:20:05.000+0100},
title = {Interacting nodal semimetals with nonlinear bands},
url = {https://link.aps.org/doi/10.1103/PhysRevB.109.045118},
volume = 109,
year = 2024
}