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

被引：5
|
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.
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页数：8
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