Indexed by: Journal paper

First Author: 周洋

Correspondence Author: TONG HAO

Co-author: 黄开谨,缪向水,徐明,程晓敏,周玲军

Journal: RSC Advances

Affiliation of Author(s): 华中科技大学

Discipline: Engineering

First-Level Discipline: Electronic Science And Technology

Document Type: J

Volume: 9

Issue: 17

Page Number: 9457-9461

DOI number: 10.1039/C9RA01485C

Date of Publication: 4373-05-01

Abstract: The thermal conductivities of GeTe/Bi2Te3 superlattice-like materials are calculated based on density functional perturbation theory (DFPT) and measured using a 3ω method. The calculated results show that the lattice thermal conductivity or thermal diffusivity of GeTe/Bi2Te3 superlattice-like materials significantly decrease due to the effects of interfaces and Bi atoms in Bi2Te3. Our measured results are in line with the theoretical calculations, and reach an extremely low thermal conductivity at 0.162 W mK−1 compared with published work on Ge–Sb(Bi)–Te, indicating the effectiveness of modulating the thermal properties of phase change materials by using Bi-based GeTe/Bi2Te3 superlattice-like materials. Our findings give a calculation method to modify the thermal characteristics of superlattice-like materials and confirm Bi-based GeTe/Bi2Te3 superlattice-like materials as promising candidates for phase change materials with lower thermal conductivity.

Links to published journals: https://www.researchgate.net/publication/332264653_Strong_interface_scattering_induced_low_thermal_conductivity_in_Bi-based_GeTeBi_2_Te_3_superlattice-like_materials