Charge State Of Impurity Atoms In Semiconductors Studyed By The Emission Mössbauer Spectroscopy Method

When studying the charge state and symmetry of the local environment of impurities, based on the data of nuclear gamma-resonance spectroscopy, it is concluded that the state of impurity atoms depends both on the type of conductivity and on whether these atoms are in the surface layer or in the bulk of semiconductors.

PHYSICAL PRINCIPLES OF THE MESSBAUER EFFECT FOR SOLVING INNER-NUCLEAR PHENOMENA IN SOLIDS

In this work, using a number of examples, it is shown that one of the promising methods for studying the physicochemical state of matter is Mössbauer spectroscopy with all the variety of its methodological approaches. The processes occurring in the shell of atoms have a negligible effect on intranuclear phenomena, and often turn out to be inaccessible for detection by other methods. Mössbauer spectroscopy reveals these influences. Four methodological approaches have been implemented and an experimental base has been created for observing the resonant absorption of квантов-quanta by 57Fe nuclei. Techniques for absorption (MS), emission Mössbauer spectroscopy (EMS), characteristic X-ray radiation (CXR), conversion electron Mössbauer spectroscopy (CEMS) allow, practically without restrictions on the elemental composition and geometric dimensions of samples (from bulk to nanometer), to carry out studies

Антиструктурные дефекты в полупроводниковых стеклах Ge-Te и Ge-As-Te

The formation of antisite defects in Ge_20Te_80 and Ge_15As_4Te_81 vitreous alloys in the form of tin atoms in tellurium sites and tellurium atoms in germanium sites is shown by emission Mössbauer spectroscopy with the ^119 mm Sn(^119 m Sn), ^119 m Te(^119 m Sn), ^125Sn(^125Te), and ^125 m Te(^125Te) isotopes. It is shown that the isovalent substitution of germanium atoms by tin atoms does not vary the symmetry of the local surrounding of germanium sites, while tin and tellurium atoms reconstruct their local surrounding in sites unnatural for them.