Ruthenium oxide as a thermoelectric material: unconventional thermoelectric properties of Li 2 RuO 3

Ruthenium oxide as a thermoelectric material: unconventional thermoelectric properties of Li 2 RuO 3

Ruthenium oxides are typical strongly correlated electron systems, where various ordering phenomena occur through delicate interplay among the charge, spin and orbital degrees of freedom. We propose that the thermoelectric properties can be improved by controlling such ordered phases in strongly cor...

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Veröffentlicht in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2015, Vol.3 (40), p.10430-10435
Hauptverfasser: Terasaki, Ichiro, Abe, Shuhei, Yasui, Yukio, Okazaki, Ryuji, Taniguchi, Hiroki
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container_end_page 10435
container_issue 40
container_start_page 10430
container_title Journal of materials chemistry. C, Materials for optical and electronic devices
container_volume 3
creator Terasaki, Ichiro
Abe, Shuhei
Yasui, Yukio
Okazaki, Ryuji
Taniguchi, Hiroki
description Ruthenium oxides are typical strongly correlated electron systems, where various ordering phenomena occur through delicate interplay among the charge, spin and orbital degrees of freedom. We propose that the thermoelectric properties can be improved by controlling such ordered phases in strongly correlated electron systems. Honeycomb Ru oxide Li 2 RuO 3 is a prime example that exhibits a unique phase transition at 540 K with a charge gap. We have found that the ordered state can be modified by substituting the Ru site partially, and succeeded in increasing the thermopower by keeping the resistivity around the same value to enhance the power factor substantially.
doi_str_mv 10.1039/C5TC01619C
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title Ruthenium oxide as a thermoelectric material: unconventional thermoelectric properties of Li 2 RuO 3
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