Behavior of the Quantum Critical Point and the Fermi-Liquid Domain in the Heavy Fermion Superconductor CeCoIn5 Studied by Resistivity

被引：18

作者：

Howald, Ludovic ^{[1
]}

Seyfarth, Gabriel ^{[1
]}

Knebel, Georg ^{[1
]}

Lapertot, Gerard ^{[1
]}

Aoki, Dai ^{[1
]}

Brison, Jean-Pascal ^{[1
]}

机构：

[1] CEA INAC SPSMS, F-38054 Grenoble, France

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2011年 / 80卷 / 02期

关键词：

CeCoIn5; resistivity; H-c2(0); quantum critical point; Fermi liquid;

D O I：

10.1143/JPSJ.80.024710

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report detailed very low temperatures resistivity measurements on the heavy fermion compounds Ce1-xLaxCoIn5 (x = 0 and 0.01), with current applied in two crystallographic directions [100] (basal plane) and [001] (perpendicular to the basal plane) under magnetic field applied in the [001] or [011] directions. We found a Fermi liquid (rho proportional to T-2) ground state, in all cases, for fields above the superconducting upper critical field. We discuss the possible location of a field induced quantum critical point with respect to H-c2(0), and compare our measurements with the previous reports in order to give a clear picture of the experimental status on this long debated issue.

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页数：7

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