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Abstract
The structural properties of glassy diboron trioxide, g-B2O3, are investigated from ambient to high pressure conditions using two types of atomic force-field models that account for many-body effects. These models are parameterized by a dipole- and force-fitting procedure of reference datasets created via first-principles calculations on a series of configurations. The predictions of the models are tested against experimental data, where particular attention is paid to the structural transitions in g-B2O3 that involve changes to both the short- and medium-range order. The models outperform those previously devised, where improvement originates from the incorporation of two key physical ingredients, namely, (i) the polarizability of the oxide ion and (ii) the ability of an oxide ion to change both size and shape in response to its coordination environment. The results highlight the importance of many-body effects for accurately modeling this challenging system.
Original language | English |
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Article number | 224508 |
Number of pages | 10 |
Journal | The Journal of Chemical Physics |
Volume | 151 |
Issue number | 22 |
Early online date | 12 Dec 2019 |
DOIs | |
Publication status | Published - 31 Dec 2019 |
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Dive into the research topics of 'Many-body effects at the origin of structural transitions in B2O3'. Together they form a unique fingerprint.Projects
- 1 Finished
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Network Structures: from Fundamentals to Functionality
Salmon, P. (PI) & Zeidler, A. (CoI)
Engineering and Physical Sciences Research Council
5/06/12 → 4/10/15
Project: Research council