Thermal Transport Across Interfaces, Two-dimensional Materials, and III-V Ternary-alloy Superlattices

Download or read book Thermal Transport Across Interfaces, Two-dimensional Materials, and III-V Ternary-alloy Superlattices written by Gabriel Jaffe (Ph.D.) and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements of the thermal conductivity across thin films and interfaces are crucial for efforts to build a predictive model of thermal conductivity at sub-micron length scales. This thesis will cover cross-plane thermal conductivity measurements of InAlAs/InGaAs superlattices where phonon interface scattering plays an important role in determining the thermal conductivity of the heterostructure. Thermal measurements are performed using the three-omega method. This method typically requires long straight heating wires to be fabricated across the sample of interest. In many cases, obstructions on a sample's surface prevent straight wires from being made. We demonstrate both experimentally and numerically that heating wires in variety of shapes can be used for three-omega experiments without introducing significant systematic error.