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Analysis of nanometer vacuum gap formation in thermo-tunneling devices

E T Enikov1 and T Makansi2

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Combined thermionic emission and tunneling of hot electrons (thermo-tunneling) has emerged as a potential new solid-state cooling technology. Practical implementation of thermo-tunneling, however, requires the formation of a nanometer-sized gap spanning macroscopically significant surfaces. This paper describes a numerical and experimental investigation into the formation of a nanometer-sized tunneling gap based on the combined action of electrostatic, elastic and Lorentz forces. Experimental data reported here were used to tune the model and extract estimates for the size of the tunneling area and the gap size, respectively. The effect of changing the strength of the magnetic field was also investigated. The presented one-dimensional (1D) analysis of the relative magnitudes of these forces indicates possible stable operation.


PACS

85.35.-p Nanoelectronic devices

79.40.+z Thermionic emission

73.40.Gk Tunneling

Subjects

Condensed matter: electrical, magnetic and optical

Electronics and devices

Surfaces, interfaces and thin films

Nanoscale science and low-D systems

Dates

Issue 7 (20 February 2008)

Received 19 July 2007, in final form 25 September 2007

Published 31 January 2008



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