| Issue |
EPL
Volume 87, Number 5, September 2009
|
|
|---|---|---|
| Article Number | 57011 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/87/57011 | |
| Published online | 24 September 2009 | |
Quantum criticality in layered CeRhIn
Snx compared with cubic CeIn
Snx
1
Max-Planck-Institute for Chemical Physics of Solids - D-01187 Dresden, Germany, EU
2
Los Alamos National Laboratory - Los Alamos, NM 87545, USA
3
I. Physik. Institut, Georg-August-Universität Göttingen - D-37077 Göttingen, Germany, EU
Corresponding author: pgegenw@gwdg.de
Received:
26
August
2009
Accepted:
2
September
2009
We report low-temperature thermal-expansion measurements on single crystals of the layered heavy fermion system CeRhIn
Snx (0.3 
x 0.6) and compare it with a previous study on the related cubic system CeIn
Snx (Küchler R. et al., Phys. Rev. Lett., 96 (2006) 256403). 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 both systems, suggesting that the crystalline anisotropy in CeRhInSnx is unimportant. This is ascribed to the effect of weak disorder in these doped systems.
PACS: 71.10.Hf – Non-Fermi-liquid ground states, electron phase diagrams and phase transitions in model systems / 71.27.+a – Strongly correlated electron systems; heavy fermions
© EPLA, 2009
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