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Interacting Nodal Semimetals with Non-linear Bands by Poli, Arianna; Wagner, Niklas; Fischer, Max; Toschi, Alessandro; Sangiovanni, Giorgio; Ciuchi, Sergio is a scholarly article available to read on EtoBox.

What is Interacting Nodal Semimetals with Non-linear Bands about?

We investigate the quasi-particle 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 $\Lambda$. 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 $\Lambda$ but is sensitive to the proximity to the Mott transition. Conversely, the scattering rate of quasi-particles and the resistivity display high-temperature exponents that crucially rely on $\Lambda$, leading to a crossover towards a conventional Fermi-liquid behaviour 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.

Author

Poli, Arianna; Wagner, Niklas; Fischer, Max; Toschi, Alessandro; Sangiovanni, Giorgio; Ciuchi, Sergio

Published

2023

Language

EN