arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1508.04788cond-mat.mtrl-sciphysics.chem-phphysics.comp-ph
收藏

磷块体和少层体系层间相互作用的性质

The Nature of the Interlayer Interaction in Bulk and Few-Layer Phosphorus

Luke Shulenburger, Andrew D. Baczewski, Zhen Zhu, Jie Guan, David Tomanek

摘要:

理论电子结构的一个突出挑战是分子和固体中范德华相互作用的描述。在解决这一问题的新的兴趣部分是由层状系统的技术前景,包括石墨,过渡金属二硫属化物,最近,黑磷,其中层间相互作用被广泛认为是由这些类型的力量占主导地位。我们报告了一系列的量子蒙特卡罗(QMC)计算散装黑磷和相关的几层磷烯,阐明了这些系统的约束力的性质,并提供基准数据,这些系统的能量。我们发现一个显着的电荷重新分配,由于相邻层上的电子之间的相互作用。与密度泛函理论(DFT)计算的比较表明,即使在不同的vdW校正的泛函之间,不仅有很大的变化,而且这些泛函未能捕捉到QMC预测的重组趋势。层之间的立体力和色散力的微妙的相互作用表明,少层磷烯提出了一个意想不到的挑战的发展vdW校正的DFT。

英文摘要:

An outstanding challenge of theoretical electronic structure is the description of van der Waals (vdW) interactions in molecules and solids. Renewed interest in resolving this is in part motivated by the technological promise of layered systems including graphite, transition metal dichalcogenides, and more recently, black phosphorus, in which the interlayer interaction is widely believed to be dominated by these types of forces. We report a series of quantum Monte Carlo (QMC) calculations for bulk black phosphorus and related few-layer phosphorene, which elucidate the nature of the forces that bind these systems and provide benchmark data for the energetics of these systems. We find a significant charge redistribution due to the interaction between electrons on adjacent layers. Comparison to density functional theory (DFT) calculations indicate not only wide variability even among different vdW corrected functionals, but the failure of these functionals to capture the trend of reorganization predicted by QMC. The delicate interplay of steric and dispersive forces between layers indicate that few-layer phosphorene presents an unexpected challenge for the development of vdW corrected DFT.

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。

↑