Large Thermopower in a Layered Oxide NaCo_2O_4

I. Terasaki; Y. Sasago; K. Uchinokura

Large Thermopower in a Layered Oxide NaCo_2O_4

Materials Science 2007-05-23 v1 Strongly Correlated Electrons

Authors: I. Terasaki , Y. Sasago , K. Uchinokura

Abstract

A transition-metal oxide NaCo_2O_4 is a layered oxide in which CoO_2 and Na alternately stack along the c axis. Recently we have found that this compound shows unusually large thermopower with low resistivity, which is comparable to those of Bi_2Te_3. The negative transverse magnetoresistance and the strongly temperature-dependent Hall coefficient suggest that electron correlation dominates the conduction mechanism in NaCo_2O_4.

Keywords

thermopower layered oxide NaCo2O4 electron correlation transition-metal oxide

Cite

@article{arxiv.cond-mat/9903162,
  title  = {Large Thermopower in a Layered Oxide NaCo_2O_4},
  author = {I. Terasaki and Y. Sasago and K. Uchinokura},
  journal= {arXiv preprint arXiv:cond-mat/9903162},
  year   = {2007}
}

Comments

3 pages (LaTeX), 4 EPS figures

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