Electron states of ultrathin crystals

The dispersion law of electrons in film-structures by the method of two-time temperature dependent Green's functions was evaluated. In variance from unbounded structures, the electron energy spectra in film possesses the top and bottom gap and the band of electron energies is narrower and strictly discrete. The conditions for the appearance and existence of the localized electron states were found and analysed as the function of boundary parameters. These results allow us to make a breakthrough in nanoelectronics.