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Extreme In-Plane Thermal Conductivity Anisotropy in Titanium Trisulfide Caused by Heat-Carrying Optical Phonons
Liu, HL; Yu, XX; Wu, KD; Gao, Y; Tongay, S; Javey, A; Chen, LD; Hong, JW; Wu, JQ
2020-07-08
Source PublicationNANO LETTERS
ISSN1530-6984
Issue7Pages:5221
SubtypeArticle
AbstractHigh in-plane anisotropies arise in layered materials with large structural difference along different in-plane directions. We report an extreme case in layered TiS3, which features tightly bonded atomic chains along the b-axis direction, held together by weaker, interchain bonding along the a-axis direction. Experiments show thermal conductivity along the chain twice as high as between the chain, an in-plane anisotropy higher than any other layered materials measured to date. We found that in contrast to most other materials, optical phonons in TiS3 conduct an unusually high portion of heat (up to 66% along the b-axis direction). The large dispersiveness of optical phonons along the chains, contrasted to many fewer dispersive optical phonons perpendicular to the chains, is the primary reason for the observed high anisotropy in thermal conductivity. The finding discovers materials with unusual thermal conduction mechanism, as well as provides new material platforms for potential heat-routing or heat-managing devices.
DOI10.1021/acs.nanolett.0c01476
WOS KeywordTIS3 ; ELECTRONICS
Language英语
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
PublisherAMER CHEMICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27914
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Liu, HL,Yu, XX,Wu, KD,et al. Extreme In-Plane Thermal Conductivity Anisotropy in Titanium Trisulfide Caused by Heat-Carrying Optical Phonons[J]. NANO LETTERS,2020(7):5221.
APA Liu, HL.,Yu, XX.,Wu, KD.,Gao, Y.,Tongay, S.,...&Wu, JQ.(2020).Extreme In-Plane Thermal Conductivity Anisotropy in Titanium Trisulfide Caused by Heat-Carrying Optical Phonons.NANO LETTERS(7),5221.
MLA Liu, HL,et al."Extreme In-Plane Thermal Conductivity Anisotropy in Titanium Trisulfide Caused by Heat-Carrying Optical Phonons".NANO LETTERS .7(2020):5221.
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