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

Yoshihiko Okamoto; Minoru Nohara; Fumiko Sakai; Hidenori Takagi

doi:10.1143/JPSJ.75.023704

Correlated metallic phase in a doped band insulator Sr _1-xRh ₂O ₄

Yoshihiko Okamoto, Minoru Nohara, Fumiko Sakai, Hidenori Takagi

Research output: Contribution to journal › Article › peer-review

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 language	English
Article number	023704
Journal	journal of the physical society of japan
Volume	75
Issue number	2
DOIs	https://doi.org/10.1143/JPSJ.75.023704
Publication status	Published - Feb 2006
Externally published	Yes

Keywords

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

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.75.023704

Cite this

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title = "Correlated metallic phase in a doped band insulator Sr 1-xRh 2O 4 ",

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.",

keywords = "Electron correlation, Metal-insulator transition, Rhodium oxide, SrRh o, Thermoelectric material",

author = "Yoshihiko Okamoto and Minoru Nohara and Fumiko Sakai and Hidenori Takagi",

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T1 - Correlated metallic phase in a doped band insulator Sr 1-xRh 2O 4

AU - Okamoto, Yoshihiko

AU - Nohara, Minoru

AU - Sakai, Fumiko

AU - Takagi, Hidenori

PY - 2006/2

Y1 - 2006/2

N2 - 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.

AB - 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.

KW - Electron correlation

KW - Metal-insulator transition

KW - Rhodium oxide

KW - SrRh o

KW - Thermoelectric material

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