Schematic diagram illustrating the definitions of energies associated with the Sommerfeld model. The horizontal axis denotes distance measured from the emitter's electrical surface, and the vertical axis denotes “forwards” (or “normal”) energy. See text for further explanation.
To show the relationships between the four formulas derived from JWKB-type approximations, for the calculation of electron escape probability .
To illustrate the definitions of parameters associated with tunneling through a rectangular barrier.
The Eckart potential, as described by Eq. (26). The potential is illustrated for and the values of shown.
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