Transport properties of the quasi-one-dimensional barium ruthenates

被引：5

作者：

Klein, Y. ^{[1
]}

Terasaki, I. ^{[1
]}

机构：

[1] Waseda Univ, Dept Appl Phys, Shinjuku Ku, Tokyo 1698555, Japan

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.76.165105

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We measured the resistivity, thermoelectric power, and Hall coefficient of polycrystalline samples of 4H-Ba(0.8)Sr(0.2)RuO(3) and 9R-BaRu(1-x)Rh(x)O(3) (0 <= x <= 0.35) with a quasi-one-dimensional crystallographic structure made of corner- and face-shared RuO(6) octahedrons in different proportions. The magnitude of the thermoelectric power is as small as that of metals, but the sign changes from positive to negative with decreasing temperature. In contrast, the Hall coefficient is positive in the range of 4.2-300 K, and its increase at low temperatures reflects a pseudogap opening in the hole band. A simple two-carrier model is used as a qualitative explanation for the transport properties.

引用

页数：6

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