Authors: Tsunehiro Takeuchi Hiroki Goto Yasuhiro Toyama Takashi Itoh Masashi Mikami
Publish Date: 2011/03/11
Volume: 40, Issue: 5, Pages: 1129-1135
Abstract
By using Albased metallic alloys characterized by a disordered structure and a narrow pseudogap of a few hundred meV in energy width persisting at the Fermi level we succeeded in preparing materials possessing a large increase of thermal conductivity with increasing temperature This unusual increase of thermal conductivity is caused by the electronic structure effect known as the bipolar diffusion effect BDE in the context of the twoband model A thermal rectifier was constructed using materials exhibiting the BDE By showing the thermal rectification of the bulk sample prepared in this study we demonstrate that our newly proposed idea of a thermal rectifier using the BDE is applicable for practical use
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