Emergence of a non-Fowler-Nordheim-type behavior for a general planar tunneling barrier |
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Affiliation: | 1. Centro Brasileiro de Pesquisas Físicas, Rua Dr. Xavier Sigaud 150, Urca, 22290-180, Rio de Janeiro, Brazil;2. Departamento de Física, Universidade Estadual de Feira de Santana, Feira de Santana, 44036-900, Bahia, Brazil |
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Abstract: | In this work we investigate a generalized tunneling barrier for planar emitters at zero-temperature. We present the evidence of the emergence of a non-Fowler-Nordheim-type general behavior for the field emission current density in the case that the Fermi energy (μ) is comparable with or smaller that the decay width (). Therefore, for some non-metals or materials that have very small Fermi energy the standard Fowler-Nordheim-type theory may require a correction. In the opposite regime, i.e., for μ much larger that , we confirm that the conventional theory is suitable for metals. |
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Keywords: | Field emission current density Planar tunneling barrier Fowler-Nordheim-type theory Small Fermi energy Non-Fowler-Nordheim-type behavior |
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