Two-dimensional van der Waals (vdW) materials exhibit high carrier mobility and tunability, making them suitable for low-power, high-performance electronic and spintronic applications. Incorporating narrow-band electronic correlation effects could further promote tunability, though mass renormalization may impact carrier mobility. It is therefore challenging to identify a vdW material with both high mobility and strong correlation. Herein, by a combination of optical spectroscopy and high-field quantum-oscillation measurements, we observe significant effective-mass enhancement in CeTe3 at low temperature, arising from not only the band-structure modulation by antiferromagnetic ordering but also the narrow-band correlation effect. Despite the mass enhancement, the quantum mobility surprisingly \textit{increases} and reaches ∼2403 cm2/Vs, likely benefiting from topological protection. Remarkably, these unique properties are maintained in atomically thin nanoflakes with quantum mobility enhanced to ∼3158 cm2/Vs. Thus, CeTe3 emerges as a promising Kondo-coupled vdW antiferromagnetic metal with high-mobility quasiparticles, potentially unlocking new device concepts.
@article{arxiv.2506.23653,
title = {Kondo-coupled van der Waals antiferromagnet with high-mobility quasiparticles},
author = {Hai Zeng and Yang Zhang and Bingke Ji and Jiaqiang Cai and Shuo Zou and Zhuo Wang and Chao Dong and Kangjian Luo and Yang Yuan and Kai Wang and Jinglei Zhang and Chuanyin Xi and Junfeng Wang and Liang Li and Yaomin Dai and Jing Li and Yongkang Luo},
journal= {arXiv preprint arXiv:2506.23653},
year = {2025}
}