P Weinberger et al 1996 J. Phys.: Condens. Matter 8 7677 doi:10.1088/0953-8984/8/41/013
`Band structure' and electrical conductivity of disordered layered systems
P Weinberger
, P M Levy
, J Banhart§, L Szunyogh,|| and B Újfalussy
Employing the Kubo - Greenwood formula, the electrical conductivity of disordered layered systems is formulated in terms of the (screened) Korringa - Kohn - Rostoker method and the coherent potential approximation. It is shown that the elements of the electrical conductivity tensor can be described in terms of `layer-diagonal' and `layer-off-diagonal' contributions. In order to discuss effects of the underlying electronic structure on the electrical conductivity, but also to point out particular contributions to it, Bloch spectral functions are formulated. A spin-polarized (relativistic) application of the present theory to non-collinear disordered magnetic multilayers allows one to discuss giant magnetoresistance (GMR) on an ab initio level in quite a general context.
- PACS
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75.50.Kj Amorphous and quasicrystalline magnetic materials
72.25.Mk Spin transport through interfaces
73.20.At Surface states, band structure, electron density of states
75.47.De Giant magnetoresistance
75.70.Cn Magnetic properties of interfaces (multilayers, superlattices, heterostructures)
- Subjects
- Dates
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Issue 41 (7 October 1996)
Received 7 December 1995, in final form 18 July 1996
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`Band structure' and electrical conductivity of disordered layered systems
P Weinberger et al 1996 J. Phys.: Condens. Matter 8 7677
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