Transport properties and electronic states in the layered thermoelectric rhodate (Bi1-xPbx)1.8Ba2Rh 1.9Oy

Satoshi Okada, Ichiro Terasaki, Hirotaka Okabe, Masanori Matoba

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

Resistivity, thermopower and Hall coefficient have been systematically measured for polycrystalline samples of (Bi1-xPbx) 1.8Ba2Rh1.9Oy. An upturn of the resistivity and the Hall coefficient below 50 K is ascribed to decrease in the density of states due to a pseudogap formation. The thermopower and Hall coefficient are nearly identical to those of the thermoelectric oxide Bi 2Sr2Co2Oy. This suggests a nearly identical density of states between the two oxides, which is also verified from a first-principle calculation, where a broader 4d orbital and a larger rhodium-rhodium distance along the in-plane direction accidentally give nearly the same density of states as those of the layered cobalt oxides.

Original languageEnglish
Pages (from-to)1525-1528
Number of pages4
JournalJournal of the Physical Society of Japan
Volume74
Issue number5
DOIs
Publication statusPublished - 2005 May 1

Keywords

  • First-principle calculation
  • Lattice misfit
  • Pseudogap
  • Thermoelectric material

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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