Studying the Effect of the Environment on Quantum Tunneling Phenomena
Development and Application of Analytical Approach for Calculating the Tunneling i...
| Full text | |
| Author(s): |
Bogos Nubar Sismanoglu
;
Janaina Correa do Nascimento
;
Eduardo Cezar Barbosa de Barros Aragão
Total Authors: 3
|
| Document type: | Journal article |
| Source: | Revista Brasileira de Ensino de Física; v. 37, n. 1 2015-03-30. |
| Abstract | |
The quantum tunneling is a phenomenon that provides numerous technological applications through direct application of the concepts of quantum mechanics. According to this phenomenon, electrons can be extracted from metal surfaces under which there is a huge potential gradient, ie, an intense local electric field. Through a system known as microhollow cathode two metal layers interspersed by a thin mica layer (with thickness d = 3 μm), perforated with holes of diameter D = 200 μm at a pressure of 20 Torr, led the extraction of cold electrons at a local electric microfield of approximately 15 V/nm. The voltage of about 390 V applied at these metals allowed the passage of electrons through the potential barrier at the cathode hole region. The Fowler-Nordheim curve confirmed the effectiveness of the phenomenon in the generation of microplasma inside the hole, visible to the naked eyes. (AU) | |
| FAPESP's process: | 12/13064-4 - Electrical and opticas characterizations of glow microplasmas and applications |
| Grantee: | Bogos Nubar Sismanoglu |
| Support Opportunities: | Regular Research Grants |