Abstract
Even though theoretical studies on non-Fourier thermal conduction have continued for many decades, experimental investigations on the topic just started in recent years. In this chapter, I will give my personal reflections on our past and recent experimental progress in elucidating the non-Fourier thermal conduction phenomena in SiGe nanowires, Si-Ge interfaces, multiwall nanotubes, and ultralong singlewall nanotubes. Non-Fourier thermal conduction includes the conventional ballistic thermal conduction in ordinary materials and the anomalous thermal transport in low dimensional systems. Due to finite-size effects, many of the non-Fourier thermal conduction behaviors observed previously can be attributed to conventional ballistic thermal conduction phenomena. On the other hand, significant experimental progress has been made to reveal the anomalous thermal conduction on low-dimensional materials of macroscopic sizes.
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