Thermal Transport Properties of Na2X (X = O and S) Monolayers

被引：9

作者：

Yan, Xinxin ^{[1
]}

Cao, Wei ^{[2
]}

Li, Haohuan ^{[1
]}

机构：

[1] Wuhan Univ, Renmin Hosp, Dept Orthoped, Wuhan 430060, Peoples R China

[2] Wuhan Univ, Sch Phys & Technol, Minist Educ, Key Lab Artificial Micro & Nanostruct, Wuhan 430072, Peoples R China

来源：

COATINGS | 2022年 / 12卷 / 09期

关键词：

two-dimensional structure; thermal conductivity; first-principle calculations; phonon scattering; FABRICATION; MEMBRANES; CHEMISTRY;

D O I：

10.3390/coatings12091294

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Motivated by the excellent functional thin film devices made from two-dimensional materials, we investigated the thermal transport properties of Na2X (X = O and S) monolayers using first-principle calculations. The thermal conductivity at room temperature was 1.055 W/mK and 1.822 W/mK for the Na2O monolayers and Na2S monolayers, respectively. The high thermal conductivity for the Na2S monolayers is mainly contributed to by in-plane transverse acoustic (TA) phonons. The group velocity for the Na2S monolayers exhibits lower group velocity and a larger phonon relaxation time than the Na2O monolayers. Our results are helpful for functional thin film devices made using Na2X (X = O and S) monolayers.

引用

页数：8

共 37 条

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