Unusual single-ion non-Fermi-liquid behavior in Ce1-xLaxNi9Ge4 -: art. no. 216404

被引：32

作者：

Killer, U ^{[1
]}

Scheidt, EW

Eickerling, G

Michor, H

Sereni, J

Pruschke, T

Kehrein, S

机构：

[1] Univ Augsburg, Inst Phys, CPM, D-86135 Augsburg, Germany

[2] Vienna Tech Univ, Inst Festkorperphys, A-1040 Vienna, Austria

[3] Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[4] Univ Gottingen, Inst Theoret Phys, D-37077 Gottingen, Germany

[5] Univ Augsburg, Inst Phys, TP EKM 3, D-86135 Augsburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 21期

基金：

奥地利科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.93.216404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on specific heat, magnetic susceptibility, and resistivity measurements on the compound Ce1-xLaxNi9Ge4 for various concentrations ranging from the stoichiometric system with x=0 to the dilute limit x=0.95. Our data reveal single-ion scaling with the Ce concentration and the largest ever recorded value of the electronic specific heat Deltac/Tapproximate to5.5 J K-2 mol(-1) at T=0.08 K for the stoichiometric compound x=0 without any trace of magnetic order. While in the doped samples Deltac/T increases logarithmically below 3 K down to 50 mK, their magnetic susceptibility behaves Fermi-liquid-like below 1 K. These properties make the compound Ce1-xLaxNi9Ge4 a unique system on the borderline between Fermi-liquid and non-Fermi-liquid physics.

引用

页码：216404 / 1

页数：4

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