title: Effect of grain size on thermal transport in post-annealed antimony telluride thin films.
abstract: The effects of grain size and strain on the temperature-dependent thermal transport of antimony telluride (Sb2Te3) thin films, controlled using post-annealing temperatures of 200°C to 350°C, were investigated using the 3-omega method. The measured total thermal conductivities of 400-nm-thick thin films annealed at temperatures of 200°C, 250°C, 300°C, 320°C, and 350°C were determined to be 2.0 to 3.7 W/m · K in the 20 to 300 K temperature range. We found that the film grain size, rather than the strain, had the most prominent effect on the reduction of the total thermal conductivity. To confirm the effect of grain size on temperature-dependent thermal transport in the thin films, the experimental results were analyzed using a modified Callaway model approach.
authors: Department of Physics, Chung-Ang University, Seoul, 156-756 Republic of Korea.
authors: No-Won
authors: NW
authors: Park
authors: Department of Physics, Chung-Ang University, Seoul, 156-756 Republic of Korea.
authors: Won-Yong
authors: WY
authors: Lee
authors: Department of Materials Engineering, Chungnam National University, Daejeon, 305-764 Republic of Korea.
authors: Ji-Eun
authors: JE
authors: Hong
authors: Department of Physics, Chung-Ang University, Seoul, 156-756 Republic of Korea.
authors: Tae-Hyun
authors: TH
authors: Park
authors: Department of Materials Engineering, Chungnam National University, Daejeon, 305-764 Republic of Korea.
authors: Soon-Gil
authors: SG
authors: Yoon
authors: Department of Semiconductor Science and Physics, Dongguk University, Seoul, 100-715 Republic of Korea.
authors: Hyunsik
authors: H
authors: Im
authors: Department of Semiconductor Science and Physics, Dongguk University, Seoul, 100-715 Republic of Korea.
authors: Hyung Sang
authors: HS
authors: Kim
authors: Department of Physics, Chung-Ang University, Seoul, 156-756 Republic of Korea.
authors: Sang-Kwon
authors: SK
authors: Lee
keywords: 3-ω technique; Antimony telluride (Sb2Te3); Grain size; Thermal conductivity; Thermal transport