The negative differential thermal resistance (NDTR) effect is an important mechanism to realize a thermal transistor that is of great significance to realize thermal control. We find that with accompanying… Click to show full abstract
The negative differential thermal resistance (NDTR) effect is an important mechanism to realize a thermal transistor that is of great significance to realize thermal control. We find that with accompanying an interface thermal resistance (ITR), which has a certain temperature-dependence, the macroscopic homojunction can present a NDTR. The temperature-dependent ITR to achieve NDTR can be realized by using materials with negative thermal expansion. As an example, a NDTR in the silicon homojunction was found at low temperature. The discovery of macro-NDTR will pave the way to design a macroscopic thermal transistor and also help us manipulate thermal flow more freely and effectively.
               
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