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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2013

Carbon structures and defect planes in diamond at high pressure

Résumé

We performed a systematic structural search of high-pressure carbon allotropes for unit cells containing from 6 to 24 atoms using the minima hopping method. We discovered a series of new structures that are consistently lower in enthalpy than the ones previously reported. Most of these include (5+7)- or (4+8)-membered rings and can therefore be placed in the families proposed by H. Niu et al. [Phys. Rev. Lett. 108, 135501 (2012)]. However, we also found three more families with competitive enthalpies that contain (5+5+8)-membered rings, sp2 motives, or buckled hexagons. These structures are likely to play an important role in dislocation planes and structural defects of diamond and hexagonal diamond.
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hal-03039791 , version 1 (04-12-2020)

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Silvana Botti, Maximilian Amsler, Jose A. Flores-Livas, Paul Ceria, Stefan Goedecker, et al.. Carbon structures and defect planes in diamond at high pressure. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2013, 88 (1), pp.014102. ⟨10.1103/PhysRevB.88.014102⟩. ⟨hal-03039791⟩
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