arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0804.1671cond-mat.mtrl-sci
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碳和金刚石成核phase diagram的最新模型

State-of-the-art models for the phase diagram of carbon and diamond nucleation

Luca M. Ghiringhelli, C. Valeriani, J. H. Los, E. J. Meijer, A. Fasolino, D. Frenkel

摘要:

本文综述了碳的相图和结晶动力学模型的最新进展。特别是,我们表明,一类特殊的键序势(所谓的LCBOP模型)以及许多已知的结构和热力学性质的碳在高压和高温下。我们将详细讨论LCBOP模型。此外,我们简要回顾了碳的相行为的实验和理论研究的“历史”。使用一个久经考验的版本的LCBOP模型(即LCBOPI+),我们解决了一些更有争议的假设有关的碳的相行为,特别是:建议,液态碳可以存在于两个阶段分离的一阶相变和猜想,钻石可以形成均匀的成核在天王星和海王星。

英文摘要:

We review recent developments in the modelling of the phase diagram and the kinetics of crystallization of carbon. In particular, we show that a particular class of bond-order potentials (the so-called LCBOP models) account well for many of the known structural and thermodynamic properties of carbon at high pressures and temperatures. We discuss the LCBOP models in some detail. In addition, we briefly review the ``history'' of experimental and theoretical studies of the phase behaviour of carbon. Using a well-tested version of the LCBOP model (viz. LCBOPI+) we address some of the more controversial hypotheses concerning the phase behaviour of carbon, in particular: the suggestion that liquid carbon can exist in two phases separated by a first-order phase transition and the conjecture that diamonds could have formed by homogeneous nucleation in Uranus and Neptune.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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