Lateral and flexural thermal transport in stanene/2D-SiC van der Waals heterostructure. (30th September 2020)

• Record Type: Journal Article
• Authors: Ahammed, Shihab; Islam, Md Sherajul; Mia, Imon; Park, Jeongwon
• Is Part Of: Nanotechnology. Volume 31:Number 50(2020)
• Publication Date: 2020-09-30
• Subjects: 2D heterostructure -- Thermal transport -- stanene/2D-SiC; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/abb491
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: Thermal management is one of the key challenges in nanoelectronic and optoelectronic devices. The development of a van der Waals heterostructure (vdWH) using the vertical positioning of different two-dimensional (2D) materials has recently appeared as a promising way of attaining desirable electrical, optical, and thermal properties. Here, we explore the lateral and flexural thermal conductivity of stanene/2D-SiC vdWH utilizing the reverse non-equilibrium molecular dynamics simulation and transient pump-probe technique. The effects of length, area, coupling strength and temperature on the thermal transport are studied systematically. The projected lateral thermal conductivity of a stanene/2D-SiC hetero-bilayer is found to be 66.67 W m − 1 K − 1, which is greater than stanene, silicene, germanene, MoSe2 and even higher than some hetero-bilayers, including MoS2 /MoSe2 and stanene/silicene. The lateral thermal conductivity increases as the length increases, while it tends to decrease with increasing temperature. The computed flexural interfacial thermal resistance between stanene and 2D-SiC is 3.0622 × 10 − 7 K.m 2 W −1, which is close to other 2D hetero-bilayers. The interfacial resistance between stanene and 2D-SiC is reduced by 70.49% and 50.118% as the temperature increases from 100 K to 600 K and the coupling factor increases from χ = 0.5 to χ = 5, respectively. In addition, various phonon modes are evaluated to disclose the fundamental mechanisms of thermal transport in the lateral and flexural direction of the hetero-bilayer. These results are important in order to understand the heat transport phenomena of stanene/2D-SiC vdWH, which could be useful for enhancing their promising applications.