Ab-initio theory of CPP transport

摘要

The phenomenon of electric transport perpendicular to the planes of atoms is discussed in terms of an ab-initio approach based on the Kubo-Greenwood equation. Since level of decription is fully relativistic "artifacts" due to spin resolution are avoided. Besides a formal discussion of the applied methods and an illustration of the numerical procedures, in particular the dependence of the magnetoresistance on the quality of interfaces, and issues concerning "tunneling" in metalon-metal heterojunctions are discussed.