Approaching quantum criticality in a partially geometrically frustrated heavy-fermion metal

V. Fritsch, N. Bagrets, G. Goll, W. Kittler, M. J. Wolf, K. Grube, C. L. Huang, H. V. Löhneysen

研究成果: Article同行評審

44 引文 斯高帕斯(Scopus)

摘要

In the antiferromagnetic (AF) heavy-fermion system CePdAl the magnetic Ce ions form a network of equilateral triangles in the (001) plane, similar to the kagomé lattice, with one third of the Ce moments not participating in the long-range order. The Néel temperature TN=2.7K is reduced upon replacing Pd by Ni in CePd1-xNixAl, with TN→0 for x=0.144, where the specific heat C exhibits a C/Tâ̂-logT dependence. Within the Hertz-Millis-Moriya model of quantum criticality, this behavior might indicate 2D critical antiferromagnetic fluctuations arising from the decoupling of 3D magnetic order by frustration. On the other hand, the simultaneous presence of Kondo effect and geometric frustration might entail a different route to quantum criticality.

原文English
文章編號054416
期刊Physical Review B - Condensed Matter and Materials Physics
89
發行號5
DOIs
出版狀態Published - 2014 二月 18

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學

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