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FIZIKA A 8 (1999) 3 , 141-146
 
DYNAMICAL EFFECTS IN FINITE FIELD ELECTRON TUNNELING
LEO MARUŠIĆ and MARIJAN SUNJIĆ
Department of Physics, University of Zagreb, Bijenička 32, 10000
Zagreb, Croatia
Dedicated to Professor Boran Leontić on the occasion of his 70th
birthday
Received 19 November 1999; revised manuscript received 11 February 2000
Accepted 14 February 2000
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.
PACS number: 73.40.Gk
UDC 74.50
Keywords: 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
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