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First-principles solution to the problem of Mo lattice stability
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Condensed Matter Theory.ORCID iD: 0000-0001-7531-3210
2008 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 77, no 22Article in journal (Refereed) Published
Abstract [en]

The energy differences between the ground state body-centered structure and closed-packed face-centered structure for transition metals in the middle of the series show unusually large disagreements when they are obtained by the thermochemical approach based on the analysis of experimental data or by first-principles electronic structure calculations. Considering a typical example, the lattice stability of Mo, we present a solution to this long-standing problem. We carry out ab initio molecular dynamics simulations for the two phases at high temperature and show that the configurational energy difference approaches the value derived by means of the thermochemical approach. The main contribution to the effect comes from the modification of the canonical band structure due to anharmonic thermal motion at high temperature.

Place, publisher, year, edition, pages
2008. Vol. 77, no 22
Keyword [en]
total-energy calculations, centered-cubic iron, wave basis-set, ab-initio, earths core, phase, molecules, system
URN: urn:nbn:se:kth:diva-17661DOI: 10.1103/PhysRevB.77.220102ISI: 000257289300002ScopusID: 2-s2.0-45349097988OAI: diva2:335706
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Belonoshko, Anatoly B.
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