Sublinear transport in Kagome metals from the interplay of Dirac cones and Van Hove singularities.

ABSTRACT: Recent experiments have revealed that many kagome metals exhibit sublinear temperature dependence in resistivity up to room temperature. Here, we develop a minimal semiclassical two-pocket model-comprising a Dirac cone and a Van Hove singularity-and show that, within an extended Fermi liquid scattering framework, internode electron-electron interactions naturally lead to sublinear scaling in both electrical and thermal transport at low temperatures. At higher temperatures, distinct scattering channels for charge and heat currents lead to a violation of the Wiedemann-Franz law. Our work provides a simple and broadly applicable framework for understanding anomalous transport in kagome metals, capturing non-Fermi-liquid behavior without requiring fine-tuning or exotic interactions.

SUBMITTER: Peshcherenko N 

PROVIDER: S-EPMC12698808 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature