A formalism to calculate the transmission coefficient t of electrons from a material into the same material through a barrier is presented. The barrier is arbitrary, and can be metallic, semiconducting, or insulating. The important feature of this formalism is that it starts from the electronic structure of a periodic superlattice. The electronic structure of such a superlattice is calculated self-consistently within a screened Korringa-Kohn-Rostoker method. The capability of this method is demonstrated by means of a free-electron model. Results for the transmission of Cu electrons through a Co layer are presented.
- Received 27 October 2000
- Published 9 April 2001
© 2001 The American Physical Society