Technical Physics Letters
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- 2023
- 2022
Peculiarities of Photoelectron Spectra of Ge Implanted with Na+ Ions
Abraeva S. T.1, Tashmukhamedova D. A.1, Yusupjanova M. B.1, Umirzakov B. E.
1
1Tashkent State Technical University, Tashkent, Uzbekistan
Email: ftmet@mail.ru
Using the methods of Auger electron and photoelectron spectroscopy and light absorption spectroscopy, the composition, densities of state of electrons in the valence band, and parameters of the energy bands of Ge (111) implanted with Na+ ions with an energy of E0=0.5 keV at a dose of Dsat=6· 1016 cm-2 and a thin layer of NaGe2 obtained by annealing ion-implanted Ge. It is shown that a narrow n-type band (~ 0.2 eV) appears in the Ge valence electron spectrum after ion implantation near the bottom of the conduction band, which is explained by the presence of a large number of unbound Na atoms in the ion-implanted layer. NaGe2 nanofilms with a band gap of ~ 0.45 eV was obtained for the first time by annealing ion-implanted Ge. Keywords: nanostructure, photoelectrons, Auger electron spectroscopy, absorption spectrum, hybridized states, electron state densities, ion implantation.
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