We report a detailed and comparative study of the single crystal CeCoInGa3 in both experiment and theory. Resistivity measurements reveal the typical behavior of Kondo lattice with the onset temperature of coherence, T∗≈50K. The magnetic specific heat can be well fitted using a spin-fluctuation model at low temperatures, yielding a large Sommerfeld coefficient, γ≈172mJ/mol K2 at 6 K, suggesting that this is a heavy-fermion compound with a pronounced coherence effect. The magnetic susceptibility exhibits a broad field-independent peak at Tχ and shows an obvious anisotropy within the bc plane, reflecting the anisotropy of the coherence effect at high temperatures. These are compared with strongly correlated calculations combining first-principles band structure calculations and dynamical mean-field theory. Our results confirm the onset of coherence at about 50 K and reveal a similar anisotropy in the hybridization gap, pointing to a close connection between the hybridization strength of the low-temperature Fermi-liquid state and the high-temperature coherence effect.
@article{arxiv.1809.04735,
title = {Anisotropic hybridization in a new Kondo lattice compound CeCoInGa$_3$},
author = {Le Wang and Yuanji Xu and Meng Yang and Qianqian Wang and Cuixiang Wang and Shanshan Miao and Youting Song and Youguo Shi and Yi-feng Yang},
journal= {arXiv preprint arXiv:1809.04735},
year = {2018}
}