Heavy fermions represent an archetypal example of strongly correlated electron systems which, due to entanglement among different interactions, often exhibit exotic and fascinating physics involving Kondo screening, magnetism and unconventional superconductivity. Here we report a comprehensive study on the transport and thermodynamic properties of a cerium-based heavy fermion compound CeBi2 which undergoes an anti-ferromagnetic transition at TN∼ 3.3 K. Its high temperature paramagnetic state is characterized by an enhanced heat capacity with Sommerfeld coefficient γ over 200 mJ/molK2. The magnetization in the magnetically ordered state features a metamagnetic transition. Remarkably, a large negative magnetoresistance associated with the magnetism was observed in a wide temperature and field-angle range. Collectively, CeBi2 may serve as an intriguing system to study the interplay between f electrons and the itinerant Fermi sea.
@article{arxiv.1802.05060,
title = {Kondo behavior and metamagnetic phase transition in a heavy fermion compound CeBi2},
author = {W. Zhou and C. Q. Xu and B. Li and R. Sankar and F. M. Zhang and B. Qian and C. Cao and J. H. Dai and Jianming Lu and Xiaofeng Xu},
journal= {arXiv preprint arXiv:1802.05060},
year = {2018}
}