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- W3210109790 abstract "The degree of thermal anisotropy affects critically key device-relevant properties of layered two-dimensional materials. Here, we systematically study the in-plane and cross-plane thermal conductivity of crystalline SnSe2 films of varying thickness (16-190 nm) and uncover a thickness-independent thermal conductivity anisotropy ratio of about ∼8.4. Experimental data obtained using Raman thermometry and frequency domain thermoreflectance showed that the in-plane and cross-plane thermal conductivities monotonically decrease by a factor of 2.5 with decreasing film thickness compared to the bulk values. Moreover, we find that the temperature-dependence of the in-plane component gradually decreases as the film becomes thinner, and in the range from 300 to 473 K it drops by more than a factor of 2. Using the mean free path reconstruction method, we found that phonons with MFP ranging from ∼1 to 53 and from 1 to 30 nm contribute to 50% of the total in-plane and cross-plane thermal conductivity, respectively." @default.
- W3210109790 created "2021-11-08" @default.
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- W3210109790 date "2021-10-28" @default.
- W3210109790 modified "2023-10-09" @default.
- W3210109790 title "Anisotropic Thermal Conductivity of Crystalline Layered SnSe<sub>2</sub>" @default.
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- W3210109790 doi "https://doi.org/10.1021/acs.nanolett.1c03018" @default.
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