Correlated metallic phase in a doped band insulator Sr 1-xRh 2O 4

Yoshihiko Okamoto, Minoru Nohara, Fumiko Sakai, Hidenori Takagi

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33 Citations (Scopus)

Abstract

Transport and thermal properties were examined for the layered rhodium oxide β-Sr 1-xRh 2O 4. The parent compound SrRh 2O 4 is a band insulator. The introduction of Sr deficiencies results in an insulator-metal transition around x ≃ 0.2. The metallic phase for x > 0.2 is a strongly correlated Fermi liquid with an enhanced quasiparticle mass. The enhanced thermoelectric power of S ∼ 150 μV/K at 1000 K in this metallic phase suggests a potential of Sr 1-xRh 2O 4 as a thermoelectric material.

Original languageEnglish
Article number023704
Journaljournal of the physical society of japan
Volume75
Issue number2
DOIs
Publication statusPublished - Feb 2006
Externally publishedYes

Keywords

  • Electron correlation
  • Metal-insulator transition
  • Rhodium oxide
  • SrRh o
  • Thermoelectric material

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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