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Tunneling Conductance of Asymmetrical Barriers
Abstract
The voltage-dependent tunneling conductance of trapezoidal potential barriers has been calculated using two extreme models of (1) the WKB approximation and (2) perfectly sharp boundaries between the metal electrode and the insulator. We show that for both models the conductance-voltage plot is roughly parabolic at low voltages (≲0.4 V). The minimum conductance is not at zero bias unless the barrier is symmetrical and identical Fermi energies are chosen for the two metal electrodes. The inclusion of image forces does not radically alter the shape of the conductance-voltage dependence. Using reasonable barrier shapes, the asymmetry of the calculated conductance about V=0 is not as large as we frequently observe experimentally. We point out that this extreme asymmetry appears to be associated with the presence of organic impurities in the oxide layer of the junction.
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Citations
Cites
Molecular Vibration Spectra by Inelastic Electron Tunneling
Lambe, J., & Jaklevic, R. C. (1968) · Physical Review · doi:10.1103/physrev.165.821 · Cited by 585
Metadata
- Authors
- Brinkman, W. F., Dynes, R. C., & Rowell, J. M.
- Venue
- Journal of Applied Physics
- Publisher
- AIP Publishing
- Published
- 1970-04-01
- Volume
- 41
- Issue
- 5
- Pages
- 1915-1921
- ISSN
- 0021-8979 (ISSN-L)
- 1089-7550
- OpenAlex
- W1976903470
- Cited by
- 852
- References
- 1
- FWCI
- 3.66
- Type
- journal article
- Language
- en
- Open access
- closed
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- Brinkman, W. F., Dynes, R. C., & Rowell, J. M. (1970). Tunneling Conductance of Asymmetrical Barriers. Journal of Applied Physics. https://doi.org/10.1063/1.1659141
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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