Condensed-matter community is involved in hot debate on the nature of quantum critical points (QCP) governing the low-temperature properties of heavy fermion metals. The smeared jump like behavior revealed both in the residual resistivity ρ0 and the Hall resistivity RH, along with the violation of the time invariance symmetry T and the charge invariance C, including the violation of quasiparticle-hole symmetry, and providing vital clues on the origin of both the non-Fermi-liquid behavior and QCP. For the first time, based on a number of important experimental data, we show that these experimental observations point out unambiguously that QCP of CeCoIn5 is accompanied by the symmetry violation, and QCP itself is represented by the topological fermion-condensation quantum phase transition (FCQPT) connecting two Fermi surfaces of different topological charges.
@article{arxiv.2311.07428,
title = {Quantum Phase Transition in $\rm CeCoIn_5$: Experimental Facts and Theory},
author = {V. R. Shaginyan and A. Z. Msezane and M. V. Zverev and Y. S. Leevik},
journal= {arXiv preprint arXiv:2311.07428},
year = {2023}
}