Effect of cationic substitution on the thermoelectric properties of In 4-xMxSe2.95 compounds (M Na, Ca, Zn, Ga, Sn, Pb; X 0.1)

Kyunghan Ahn, Eunseog Cho, Jong Soo Rhyee, Sang Il Kim, Sang Mock Lee, Kyu Hyoung Lee

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26 Citations (Scopus)

Abstract

We report an electrical and thermal transport study for polycrystalline samples of In4Se3-x substituted with various metals. Our experimental and theoretical investigation revealed that the Na, Ca, and Pb substitutions at the In4 site in the 4:3 indium selenide lattice are more effective for increase in electron concentration than the Zn, Ga, and Sn substitutions at other sites, and the Peierls distortion in cationic substituted compounds may not be as strong as In4Se3-x based on higher lattice thermal conductivities of the former than the latter. It is found that the cationic substitutions may weaken the effect of Peierls distortion on thermal properties for In4Se3-x while they maintain the same trend for electrical properties of In4Se3-x with different electron concentrations.

Original languageEnglish
Article number102110
JournalApplied Physics Letters
Volume99
Issue number10
DOIs
Publication statusPublished - 2011 Sep 5

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substitutes
indium selenides
electrons
thermal conductivity
thermodynamic properties
electrical properties
trends
metals

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Ahn, Kyunghan ; Cho, Eunseog ; Rhyee, Jong Soo ; Il Kim, Sang ; Mock Lee, Sang ; Hyoung Lee, Kyu. / Effect of cationic substitution on the thermoelectric properties of In 4-xMxSe2.95 compounds (M Na, Ca, Zn, Ga, Sn, Pb; X 0.1). In: Applied Physics Letters. 2011 ; Vol. 99, No. 10.
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abstract = "We report an electrical and thermal transport study for polycrystalline samples of In4Se3-x substituted with various metals. Our experimental and theoretical investigation revealed that the Na, Ca, and Pb substitutions at the In4 site in the 4:3 indium selenide lattice are more effective for increase in electron concentration than the Zn, Ga, and Sn substitutions at other sites, and the Peierls distortion in cationic substituted compounds may not be as strong as In4Se3-x based on higher lattice thermal conductivities of the former than the latter. It is found that the cationic substitutions may weaken the effect of Peierls distortion on thermal properties for In4Se3-x while they maintain the same trend for electrical properties of In4Se3-x with different electron concentrations.",
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Effect of cationic substitution on the thermoelectric properties of In 4-xMxSe2.95 compounds (M Na, Ca, Zn, Ga, Sn, Pb; X 0.1). / Ahn, Kyunghan; Cho, Eunseog; Rhyee, Jong Soo; Il Kim, Sang; Mock Lee, Sang; Hyoung Lee, Kyu.

In: Applied Physics Letters, Vol. 99, No. 10, 102110, 05.09.2011.

Research output: Contribution to journalArticle

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AU - Ahn, Kyunghan

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AU - Mock Lee, Sang

AU - Hyoung Lee, Kyu

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AB - We report an electrical and thermal transport study for polycrystalline samples of In4Se3-x substituted with various metals. Our experimental and theoretical investigation revealed that the Na, Ca, and Pb substitutions at the In4 site in the 4:3 indium selenide lattice are more effective for increase in electron concentration than the Zn, Ga, and Sn substitutions at other sites, and the Peierls distortion in cationic substituted compounds may not be as strong as In4Se3-x based on higher lattice thermal conductivities of the former than the latter. It is found that the cationic substitutions may weaken the effect of Peierls distortion on thermal properties for In4Se3-x while they maintain the same trend for electrical properties of In4Se3-x with different electron concentrations.

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