Lattice dynamics of fcc crystals under hydrostatic loading
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F12%3APU100807" target="_blank" >RIV/00216305:26210/12:PU100807 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Lattice dynamics of fcc crystals under hydrostatic loading
Original language description
Lattice dynamics and stability of four fcc crystals (Al, Ir, Pt, and Au) under isotropic (hydrostatic) tensile loading is studied from first principles using the linear response method and the harmonic approximation. A relevant analysis of elastic stability conditions is also performed and the results obtained by means of both approaches are compared. The results reveal that, contrary to former expectations, strengths of all the studied crystals are limited by instabilities related to soft phonons withfinite or vanishing wave vectors. The critical strains associated with such instabilities are remarkably lower than those related to the volumetric instability. On the other hand, the corresponding reduction of the tensile strength is by 20 % at the most.
Czech name
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Czech description
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Classification
Type
O - Miscellaneous
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů