Large Anharmonicity and Low Lattice Thermal Conductivity of Thermoelectric Sn(SbTe2)2

被引：3

作者：

Tanusilp, Sora-at ^{[1
]}

Kumagai, Masaya ^{[1
,2
]}

Ohishi, Yuji ^{[3
]}

Sadayori, Naoki ^{[4
]}

Kurosaki, Ken ^{[1
,5
]}

机构：

[1] Kyoto Univ, Inst Integrated Radiat & Nucl Sci, 2 Asashiro Nishi,Kumatori Cho, Osaka 5900494, Japan

[2] SAKURA Internet Inc, SAKURA Internet Res Ctr, Kita Ku, Grand Front Osaka Tower A 35F,4-20 Ofukacho, Osaka 5300011, Japan

[3] Osaka Univ, Grad Sch Engn, 2-1 Yamadaoka, Suita, Osaka 5650871, Japan

[4] Nitto Denko Corp, Corp Res & Dev Div, 1-1-2 Shimohozumi, Ibaraki, Osaka 5678680, Japan

[5] Univ Fukui, Res Inst Nucl Engn, 1-3-33 Kanawa Cho, Tsuruga, Fukui 9140055, Japan

来源：

PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS | 2022年 / 16卷 / 01期

基金：

日本科学技术振兴机构;

关键词：

anharmonicity; Gruneisen parameters; Sn(SbTe2)(2); thermal conductivity; thermoelectrics;

D O I：

10.1002/pssr.202100482

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Very recently, it has been reported that Sn(SbTe2)(2) exhibits a low kappa(lat) (approximate to 0.46 W m(-1) K-1 at 720 K), thus making Sn(SbTe2)(2) a good thermoelectric material. The low kappa(lat) is thought to be due to the anharmonicity of the lattice, but no experimental evidence for this has been reported. Herein, the origin of such low kappa(lat) in Sn(SbTe2)(2) is experimentally investigated by measuring various physical properties and the linear thermal expansion coefficient. The results show that the Gruneisen parameter of Sn(SbTe2)(2) is very high, 3.38, which means that Sn(SbTe2)(2) has a large anharmonicity. Due to this large anharmonicity, the Sn(SbTe2)(2) sample shows a very low kappa(lat) and a relatively high thermoelectric figure of merit zT of 0.32 at 770 K.

引用

页数：5

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