Quantum criticality in layered CeRhIn_{5-x}Sn_x compared with cubic CeIn$_{3-x}Sn_x

Abstract

We report low-temperature thermal-expansion measurements on single crystals of the {\it layered} heavy fermion system \cri ($0.3\le x\le 0.6$) and compare it with a previous study on the related {\it cubic} system \ci [R. Küchler {\it et al.}, Phys. Rev. Lett. {\bf 96}, 256403 (2006)]. Both systems display a quantum critical point as proven by a divergent Grüneisen ratio. Most remarkably, the three-dimensional itinerant model explains quantum criticality in {\it both} systems, suggesting that the crystalline anisotropy in \cri is unimportant. This is ascribed to the effect of weak disorder in these doped systems.

Eur. Phys. Lett., to be published

References in corpus (4)

• Quantum Criticality in Heavy Fermion Metals
• Weak magnetism and non-Fermi liquids near heavy-fermion critical points
• Disorder-Driven Non-Fermi Liquid Behavior of Correlated Electrons
• Dimensional crossover of quantum critical behavior in CeCoIn${}_5$