On the systematics of hydrostatic pressure induced phase transitions in II-III2-VI4 compounds depending on their composition
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2023-09-01 18:26
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URSAKI, Veacheslav. On the systematics of hydrostatic pressure induced phase transitions in II-III2-VI4 compounds depending on their composition. In: Materials Science and Condensed Matter Physics, Ed. 7, 16-19 septembrie 2014, Chișinău. Chișinău, Republica Moldova: Institutul de Fizică Aplicată, 2014, Editia 7, p. 130.
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Materials Science and Condensed Matter Physics
Editia 7, 2014
Conferința "Materials Science and Condensed Matter Physics"
7, Chișinău, Moldova, 16-19 septembrie 2014

On the systematics of hydrostatic pressure induced phase transitions in II-III2-VI4 compounds depending on their composition


Pag. 130-130

Ursaki Veacheslav
 
Institute of the Electronic Engineering and Nanotechnologies "D. Ghitu" of the Academy of Sciences of Moldova
 
Disponibil în IBN: 4 martie 2019


Rezumat

This work generalizes the most stable as-grown structures of AIIBIII 2XVI 4 compounds with S and Se as X, their high pressure phases, and their structures upon decompression. The revealed scheme of phase transitions is shown in Fig. 1. All compounds with initial tetragonal structure transform to a RockSalt-type structure under pressure through a pressure induced disordering process. The recovered structure is mostly of disordered ZincBlende-type, however, spinel or layered structure is possible in some compounds. The recovered structure of spinels and layered materials upon decompression is either spinel or layer, however, not necessarily the initial one, while the high pressure phase is spinel for layered materials, and LiTiO2-type or CaFe2O4-type for spinels. The peculiarities of these phase transitions are discussed in this work.