Thermal Conductivity Anisotropy in Phonon Transport of Bi2Te3/Bi0.5Sb1.5Te3 Superlattice Film
- Authors
- Kang, Soo-Young; Park, No-Won; Lee, Won-Yong; Kang, Min-Sung; Kim, Gil-Sung; Koo, Sang-Mo; Koh, Jung-Hyuk; Lee, Sang-Kwon
- Issue Date
- Apr-2020
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- Phonon Transport; Thermal Conductivity; Anisotropy; Superlattice Films; 3-Omega Method
- Citation
- JOURNAL OF NANOELECTRONICS AND OPTOELECTRONICS, v.15, no.4, pp 463 - 467
- Pages
- 5
- Journal Title
- JOURNAL OF NANOELECTRONICS AND OPTOELECTRONICS
- Volume
- 15
- Number
- 4
- Start Page
- 463
- End Page
- 467
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/52876
- DOI
- 10.1166/jno.2020.2757
- ISSN
- 1555-130X
1555-1318
- Abstract
- Nanoscale superlattice thin films generally exhibit larger phonon and electron scattering at the interface in the direction of the cross-plane of the samples. Therefore, it is very important to further detailed study of espe-cially phonon transport of the superlattice films. Here, we report temperature dependent thermal conductivity anisotropy in phonon transport of Bi2Te3/Bi0.5Sb1.5Te3 superlattice thin films at 200-500 K. Thermal conductiv-ity of these thin films for in-and cross-plane thermal conductivities were determined to be approximately 0.74 and 0.4 W m(-1) K-1 at 200-500 K, respectively, clearly indicating similar to 185% suppression in-and cross-plane thermal conductivities of the superlattice thin films with a large anisotropic behavior. Such large anisotropy in the thermal conductivity can be attributed to enhanced phonon scattering occurring at the interface of the Bi2Te3 and Bi0.5Sb1.5Te3 layer.
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Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
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