engleski

Dynamical Effects in Finite Field Electron Tunneling

The problem of dynamical screening for electrons tunneling in the metal-insulator-metal system, based on a generalization of the Jonson's nonlocal theory of exchange-correlation potential, is reviewed. The self-energy is evaluated within the GW approximation for electrons coupled to the long-wavelength charge-density oscillations. Effective potential barriers are obtained by selfconsistent non-local numerical calculation, and then used to get transmission coefficient exactly and within the WKB approximation. The method is also extended to the case with an external potential applied on metal electrodes, and transmission coefficient is plotted as a function of electron energy, and external potential.

M-I-M system; tunneling; screening

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