Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2008-07-16
J. Vac. Sci. Technol. A, v. 26, p. 5, (2008)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
9 pages, 3 figures
Scientific paper
10.1116/1.2803717
The authors use two insulator layers in thermotunnel refrigerator to modify the shape of the tunneling barrier so that electrons with high kinetic energy pass it with increased probability. Theoretical analysis show that the overall tunneling current between the electrodes contains an increased number of high kinetic energy electrons and a reduced number of low energy ones, leading to high efficiency. The particular case of vacuum gap and solid insulator layer is calculated using digital methods. Efficiency remains high in the wide range of the emitter electric field. The cooling coefficient is found to be as high as 40%-50% in the wide range of the emitter electric field.
Svanidze Vasiko
Tavkhelidze Avto
Tsakadze Leri
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