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Dynamical effects in finite field electron tunnelling

Leo Marušić ; Department of Physics, University of Zagreb, Bijenička 32, 10000 Zagreb, Croatia
Marijan Šunjić ; Department of Physics, University of Zagreb, Bijenička 32, 10000 Zagreb, Croatia

Sažetak

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.

Ključne riječi

metal-insulator-metal system; electron tunneling; dynamical screening; exchange-correlation potential; GW approximation; long-wavelength charge-density oscillations; exact transmission coefficient; potential applied on metal electrodes

Hrčak ID:

300967

URI

https://hrcak.srce.hr/300967

Datum izdavanja:

1.7.1999.

Podaci na drugim jezicima: hrvatski

Posjeta: 174 *