Physical properties of quasi-one-dimensional SrNbO3.41 and Luttinger liquid analysis of electrical transport

被引：12

作者：

de Campos, A. ^{[1
,4
]}

da Luz, M. S. ^{[1
,4
]}

dos Santos, C. A. M. ^{[1
,2
]}

Rice, A. T. ^{[1
]}

Deml, A. M. ^{[1
]}

White, B. D. ^{[1
]}

Neumeier, J. J. ^{[1
]}

Cohn, J. L. ^{[3
]}

机构：

[1] Montana State Univ, Dept Phys, Bozeman, MT 59717 USA

[2] Univ Sao Paulo, Escola Engn Lorena, BR-12602810 Lorena, SP, Brazil

[3] Univ Miami, Dept Phys, Coral Gables, FL 33124 USA

[4] Univ Fed Triangulo Mineiro, Inst Ciencias Tecnol & Exatas, BR-38025180 Uberaba, MG, Brazil

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 12期

基金：

美国国家科学基金会; 巴西圣保罗研究基金会;

关键词：

THERMAL-EXPANSION;

D O I：

10.1103/PhysRevB.82.125117

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the diagonal components of the electrical resistivity tensor of quasi-one-dimensional SrNbO3.41, determined using the Montgomery method. The results confirm quasi-one-dimensional behavior but show a smaller anisotropy than previously reported. High-resolution linear thermal expansion reveals weakly anisotropic behavior and no evidence of charge-density wave formation, which has been suspected as the cause of the upturn in the electrical resistivity rho near 50 K. Heat-capacity measurements reveal an electronic heat-capacity coefficient that is near zero with a Debye temperature Theta(D)=382(1) K. We report that rho exhibits power-law behavior, as expected within the framework of Luttinger liquid theory for quasi-one-dimensional systems. Detailed analysis of the data above 100 K implies relatively strong correlations and the possibility of a gap in the spin-excitation spectrum. The origin of the small energy gap below 50 K and the conduction mechanism in this region remain as outstanding issues.

引用

页数：7

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