Work

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

Year: 2025

Type: article

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.

Source: Nature Communications

DOI: 10.1038/s41467-025-65685-0

Authors: Nikolai Peshcherenko, Ning Mao, Claudia Felser, Yang Zhang

Institutions: Max Planck Institute for Chemical Physics of Solids, University of Tennessee at Knoxville

Language: English

Topic: Advanced Condensed Matter Physics

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $6,990

Funder: Alexander von Humboldt-Stiftung