The thermopower of superconducting NaxCoO2•γH2O;: evidence for conduction in a very narrow band

被引：7

作者：

Fisher, B ^{[1
]}

Chashka, KB

Pattagan, L

Kanigel, A

Knizhnik, A

Bazalitsky, G

Reisner, GM

机构：

[1] Technion, Dept Phys, IL-32000 Haifa, Israel

[2] Technion, Crown Ctr Superconduct, IL-32000 Haifa, Israel

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2003年 / 15卷 / 37期

关键词：

D O I：

10.1088/0953-8984/15/37/L03

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The absolute thermopower (S) of superconducting NaxCoO2.gammaH(2)O is p-type. It increases superlinearly with temperature up to similar to50 K; at higher temperatures its rate of change decreases and saturation at S approximate to 40 muV K-1 is observed above 150 K. S(T) for NaxCoO2.gammaH(2)O resembles that of anhydrous NaxCoO2 (x approximate to 0.7), but is lower by a factor of similar to2 and its saturation is more pronounced. These results are consistent with electronic transport by strongly correlated electrons in a very narrow band.

引用

页码：L571 / L577

页数：7

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