Yb-based heavy-fermion metal situated close to a quantum critical point

被引：64

作者：

Hossain, Z ^{[1
]}

Geibel, C

Weickert, F

Radu, T

Tokiwa, Y

Jeevan, H

Gegenwart, P

Steglich, F

机构：

[1] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany

[2] Indian Inst Technol, Dept Phys, Kanpur 208016, Uttar Pradesh, India

来源：

PHYSICAL REVIEW B | 2005年 / 72卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.72.094411

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report low-temperature thermodynamic, magnetic, and transport measurements on high-quality single crystals of the tetragonal heavy-fermion system YbIr2Si2. Depending on synthesis conditions it crystallizes either in the I-type body-centered ThCr2Si2 or P-type CaBe2Ge2 structure. The P-type system has a low Kondo scale T-K=2 K and orders magnetically below 0.7 K whereas the I-type system remains paramagnetic and shows, above 0.5 K, a temperature dependence of the resistivity and the specific heat similar to that of YbRh2Si2. In contrast to YbRh2Si2 which exhibits non-Fermi-liquid behavior, YbIr2Si2 reaches a Landau Fermi-liquid state below 0.2 K and is thus ideally suited for pressure studies across the quantum critical point.

引用

页数：4

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