Enhancing the superconducting transition temperature of the heavy fermion compound CeIrIn5 in the absence of spin correlations -: art. no. 037007

被引：48

作者：

Kawasaki, S ^{[1
]}

Zheng, GQ

Kan, H

Kitaoka, Y

Shishido, H

Onuki, Y

机构：

[1] Osaka Univ, Grad Sch Engn Sci, Dept Mat Engn Sci, Osaka 5608531, Japan

[2] Okayama Univ, Dept Phys, Okayama 7008530, Japan

[3] Osaka Univ, Grad Sch Sci, Dept Phys, Osaka 5600043, Japan

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.94.037007

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on a pressure- (P-)induced evolution of superconductivity and spin correlations in CeIrIn5 via the In-115 nuclear-spin-lattice-relaxation rate measurements. We find that applying pressure suppresses dramatically the antiferromagnetic fluctuations that are strong at ambient pressure. At P=2.1 GPa, T-c increases to T-c=0.8 K, which is twice T-c (P=0 GPa), in the background of Fermi-liquid state. This is in sharp contrast to the previous case in which a negative, chemical pressure (replacing Ir with Rh) enhances magnetic interaction and increases T-c. Our results suggest that multiple mechanisms work to produce superconductivity in the same compound CeIrIn5.

引用

页数：4

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