Electron exchange between neutral and ionized impurity iron centers in vitreous arsenic selenide


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Аннотация

Impurity iron atoms in vitreous arsenic-selenide As2Se3 films modified by iron form one-electron donor centers with an ionization energy of 0.24 (3) eV (the energy is counted from the conduction-band bottom). The Fermi level is shifted with an increase in the iron concentration from the mid-gap to the donorlevel position of iron due to the filling of one-electron states of the acceptor type lying below the Fermi level. At an iron concentration of ≥3 at %, the electron-exchange process is observed between neutral and ionized iron centers resulting in a change both in the electron density and in the tensor of the electric-field gradient at iron-atom nuclei with increasing temperature above 350 K.

Авторлар туралы

A. Marchenko

Herzen State Pedagogical University of Russia

Email: ppseregin@mail.ru
Ресей, St. Petersburg, 191186

E. Terukov

Ioffe Physical–Technical Institute

Email: ppseregin@mail.ru
Ресей, St. Petersburg, 194021

A. Egorova

St.-Petersburg Mining University

Email: ppseregin@mail.ru
Ресей, St. Petersburg, 199106

V. Kiselev

Herzen State Pedagogical University of Russia

Email: ppseregin@mail.ru
Ресей, St. Petersburg, 191186

P. Seregin

Herzen State Pedagogical University of Russia

Хат алмасуға жауапты Автор.
Email: ppseregin@mail.ru
Ресей, St. Petersburg, 191186

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