TITLE

Nanoscale heat conduction across tunnel junctions

AUTHOR(S)
Ju, Y. Sungtaek; Hung, M.-T.; Carey, M. J.; Cyrille, M.-C.; Childress, J. R.
PUB. DATE
May 2005
SOURCE
Applied Physics Letters;5/16/2005, Vol. 86 Issue 20, p203113
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Nanoscale heat conduction across tunnel junctions prepared through natural oxidation of metal electrodes is experimentally studied. The thermal resistance of AlOx tunnel barriers increases linearly with barrier thickness, which is consistent with the prevailing theory of heat conduction in highly disordered materials. Heat conduction across tunnel junctions is strongly impeded by finite thermal resistance at interfaces between barrier and electrode layers, which can be exploited to create superior thermal barrier coatings. The thermal conductivity of nanolaminates consisting of a series of Ta/TaOx tunnel junctions is determined to be well below the minimum thermal conductivity limit.
ACCESSION #
17164880

 

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