Ultralow lattice thermal conductivity in topological insulator TlBiSe2

被引：32
|
作者：
Ding, Guangqian [1 ,2 ]
Carrete, Jesus [3 ]
Li, Wu [4 ]
Gao, G. Y. [1 ,2 ]
Yao, Kailun [1 ,2 ]
机构：
[1] Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China
[2] Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr, Wuhan 430074, Peoples R China
[3] CEA Grenoble, 17 Rue Martyrs, F-38054 Grenoble, France
[4] Shenzhen Univ, Inst Adv Study, Shenzhen 518060, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2016年 / 108卷 / 23期
基金：
中国国家自然科学基金;
关键词：
THERMOELECTRIC-MATERIALS; CRYSTALS; EQUATION; BULK; PBTE;
D O I：
10.1063/1.4953588
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We present ab-initio calculations of the phonon thermal transport properties of topological insulator TlBiSe2. Our results point to a very low lattice thermal conductivity, comparable or lower than those of some popular good thermoelectric materials. Furthermore, we find a slight thermal anisotropy between the in-plane and cross-plane directions in TlBiSe2, markedly smaller than those of van-der-Waals topological insulators explored so far. These conclusions are confirmed and explained by comprehensive analysis of the phonon spectrum of TlBiSe2. The combination of ultra-low lattice thermal conductivity and small anisotropy makes TlBiSe2 a promising candidate for thermoelectric applications. Published by AIP Publishing.
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页数：4
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