Enhanced thermoelectric power and electronic correlations in RuSe{sub 2}

Wang, Kefeng; Wang, Aifeng; Tomic, A.; Wang, Limin; Abeykoon, A. M. Milinda; Dooryhee, E.; Billinge, S. J. L.

doi:10.1063/1.4913919

Title: Enhanced thermoelectric power and electronic correlations in RuSe{sub 2}

Journal Article · Wed Apr 01 00:00:00 EDT 2015 · APL materials

DOI:https://doi.org/10.1063/1.4913919· OSTI ID:22415276

Wang, Kefeng; Wang, Aifeng; Tomic, A.; Wang, Limin; Abeykoon, A. M. Milinda; Dooryhee, E. ^[1]; Billinge, S. J. L. ^[2]

Photon Sciences Directorate, Brookhaven National Laboratory, Upton, New York 11973 (United States)
Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)

We report the electronic structure, electric and thermal transport properties of Ru{sub 1−x}Ir{sub x}Se{sub 2} (x ≤ 0.2). RuSe{sub 2} is a semiconductor that crystallizes in a cubic pyrite unit cell. The Seebeck coefficient of RuSe{sub 2} exceeds −200 μV/K around 730 K. Ir substitution results in the suppression of the resistivity and the Seebeck coefficient, suggesting the removal of the peaks in density of states near the Fermi level. Ru{sub 0.8}Ir{sub 0.2}Se{sub 2} shows a semiconductor-metal crossover at about 30 K. The magnetic field restores the semiconducting behavior. Our results indicate the importance of the electronic correlations in enhanced thermoelectricity of RuSb{sub 2}.

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OSTI ID:: 22415276

Journal Information:: APL materials, Vol. 3, Issue 4; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2166-532X

Country of Publication:: United States

Language:: English

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