MICROTHEORY OF THIN LAYERED CRYSTALLINE STRUCTURES

Electron subsystem of ultrathin films was analysed using Green's function method including quantum size effect and effect of boundaries to Hamiltonian parameters. We have calculated diagonal components of electron Green's functions which enabled the complete insight into the thermodynamical properties of electrons. The comparison with crystal bulk have shown that electronic based properties of the materials are strongly influenced both by the sample dimensions and boundary conditions. The numerical calculations performed for metallic films show that localized states and spatial distribution of free electrons may be manipulated by varying the surface parameters which is significant for operation of devices based on thin films.
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