Ukrainian Journal of Physical Optics 


Number  4, Volume 5,  2004

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On the Electron Spectrum of Crystalline Superstructures  
1,2Lukiyanets B.A.

1Institute of Physical Optics, 23 Dragomanov St., 79005 Lviv, Ukraine
2National University "Lvivska Politekhnika", 12 Bandera St., 79640 Lviv, Ukraine

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Electron spectrum is analysed for the crystal that can be represented as a system of two ordered structures nested one into the other. Intercalated layered crystals, crystalline systems with the spin, charge, deformation or dipole ordering, the adsorbent-adsorbate systems and the superstructures may be relevant examples. The detailed consideration of the structures with incom-mensurable parameters of their lattices is presented. It is pointed to a unique possibility for essential change in the electron spectrum, in particular for the case of ferroelectrics.

PACS: 71.15.-m, 64.70.Rh
Key words: superstructure, incommensurable lattices, electron spectrum

doi 10.3116/16091833/5/4/147/2004

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