Kondo ground states and non-Fermi-liquid behavior in CeNi1-xCoxGe2 -: art. no. 214433

被引：19

作者：

Lee, BK

Hong, JB

Kim, JW

Jang, KH

Mun, ED

Jung, MH

Kimura, S

Park, T

Park, JG

Kwon, YS ^{[1
]}

机构：

[1] Sungkyunkwan Univ, BK21 Phys Res Div, Suwon 440746, South Korea

[2] Sungkyunkwan Univ, Inst Basic Sci, Suwon 440746, South Korea

[3] Inst Mol Sci, UVSOR Facil, Okazaki, Aichi 4448585, Japan

[4] Seoul Natl Univ, Ctr Strongly Correlated Mat Res, Seoul 151742, South Korea

[5] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[6] Korea Basic Sci Inst, Natl Res Lab Mat Sci, Taejon 305333, South Korea

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.71.214433

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report measurements of the magnetic susceptibility, specific heat, and electrical resistivity of the heavy fermion alloy series CeNi1-xCoxGe2. With increasing x, hybridization between the localized 4f and conduction band electrons is enhanced. The magnetic order observed at x=0 is completely suppressed at x=0.3 and non-Fermi-liquid behavior appears at the critical concentration, which is analyzed in terms of two-dimensional antiferromagnetic quantum fluctuations. Specific heat and magnetic susceptibility data are quantitatively explained by the Coqblin-Schrieffer model with degenerate impurity spin j=1/2, 3/2, and 5/2 for Co concentration range of x <= 0.6, 0.7 <= x <= 0.8, and x >= 0.9, respectively.

引用

页数：9

共 38 条

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