Pressure-Induced Phase Transitions in AB2X4 Chalcogenide Compounds.pdf

Pressure-Induced Phase Transitions in AB2X4 Chalcogenide Compounds PDF

This book on pressure-induced phase transitions in AB2X4 chalcogenide compounds deals with one important AmBnXp material. The interest in these materials is caused by their properties. The results are discussed for three main groups of structural families: cubic-spinel structures, defective tetragonal structures, and other structures like layered and wurtzite-type modifications. A systematic analysis of the behavior of cubic (spinel), tetragonal (defect chalcopyrites and stannites) and other crystal modifications of AB2X4 compounds under hydrostatic pressure is performed. The behavior of AIIAl2S4, AIIGa2S4, AIIAl2Se4 and AIIGa2Se4 compounds with defective tetragonal structures, compounds with layered and wurtzite structures under hydrostatic pressure and the pressure dependence of the band gap, lattice parameters, interatomic distances, vibrational modes and pressure-induced phase transitions is discussed. Many of these compounds, except oxide spinels, undergo a pressure-induced phase transition towards the rocksalt-type structure. The phase transition is preceded by disorder in the cation sublattice. The dependence of the transition pressure to the rocksalt-type structure as a function of the compound ionicity and the size criterion is analyzed.  At high pressures, all ordered-vacancy compounds are found to exhibit a band anticrossing between several conduction bands that leads to a strong decrease of its pressure coefficient and consequently to a strong non-linear pressure dependence of the direct bandgap energy. Theoretical studies of phase transitions in several ordered-vacancy compounds reveal that the existence of ordered vacancies alter the cation-anion bond distances and their compressibilities. The book is written for students, Ph D. students and specialists in materials science, phase transitions and new materials.

News 9/2013 Materials Science 135 T. Correia, National Physical Laboratory, Teddington, UK; Q. Zhang, Cranfield University, Cranfield, UK (Eds) Monatsausstellung März 2014 - Österreichische ...

3.84 MB DATEIGRÖSSE
3642403662 ISBN
Englisch SPRACHE
Pressure-Induced Phase Transitions in AB2X4 Chalcogenide Compounds.pdf

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Sofia Voigt

25GPa in order to study its pressure-induced phase transitions. These measurements have been complemented and compared with lattice-dynamics ab initio calculations including the TO-LO splitting at high pressures in order to provide a better assignment of experimental Raman modes. In addition, experimental and theoretical Grüneisen parameters USPEX Publications — USPEX

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Matteo Müller

31 Dec 2019 ... This book on pressure-induced phase transitions in AB2X4 chalcogenide compounds deals with one important AmBnXp material. The interest ...

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Noel Schulze

- Ca. 4700 S. - (Applied mechanics and materials ; 513/517) e-book Manjon, Francisco Javier: Pressure-Induced Phase Transitions in AB2X4 Chalcogenide Compounds / edited by Francisco Javier Manjon, Ion Tiginyanu, Veaceslav Ursaki. - Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. - XIII, 243 p. 121 illus., 33 illus. in color. - (Springer MALTA Project - Welcome - MALTA-CONSOLIDER

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Calcutta University - University of Calcutta

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Jessica Kohmann

This book on pressure-induced phase transitions in AB2X4 chalcogenide compounds deals with one important AmBnXp material. The interest in these materials is caused by their properties. The results khapicridi.site