Physics – Condensed Matter – Materials Science
Scientific paper
2007-09-22
PRL 99, 047206 (2007)
Physics
Condensed Matter
Materials Science
4pgs, 3 figs
Scientific paper
10.1103/PhysRevLett.99.047206
Precisely engineered tunnel junctions exhibit a long sought effect that occurs when the energy of the electron is comparable to the potential energy of the tunneling barrier. The resistance of metal-insulator-metal tunnel junctions oscillates with an applied voltage when electrons that tunnel directly into the barrier's conduction band interfere upon reflection at the classical turning points: the insulator-metal interface, and the dynamic point where the incident electron energy equals the potential barrier inside the insulator. A model of tunneling between free electron bands using the exact solution of the Schroedinger equation for a trapezoidal tunnel barrier qualitatively agrees with experiment.
Akerman Johan
Dave R. W.
Li Zhi-Pan
Miller Casey W.
Schuller Ivan K.
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